Fr T.J. Linane, From Abel to Zundolovich, Vol. 2: Biographies of Priests on the Australian Scene up to 1900, 1980, p 43:

Clancy, Daniel John, Very Rev., SJ, Irish
From County Clare ("God Help Us"!)
We lack a pen picture of this Jesuit teacher and Rector in a few houses, and so probably these collected details do not do him justice. Born in County Clare on 14 January 1836 he received his training and experience in Clongoweswood, Dublin, in Louvain, and Tullabeg. Ordination took place on 8 September 1872. After service in Ireland he was sent to Australia, arriving in Melbourne on the 'Santiago' in December 1877. Movements in the first few years are obscure, but in 1878 he was assistant to Father Joseph Dalton at St. Mary's, North Sydney. Later Rector at the St. Kilda House, Woolloomooloo, at least in 1881. Rector at St. John's College, University of Sydney in 1884. Directories in 1886 and 1889 place him at St. Aloysius, Bourke St., Sydney - being in charge in that latter year. Teaching duties at Xavier College, Kew, were the last of his assignments. He died while stationed at Xavier on 6 September 1895. The age was 59, and burial took place in the Jesuit Vault at The Boroondara Cemetery, Kew.
Addendum
Father F. Dennett, Jesuit Archivist, Hawthorn, writes: I may be able to supply that lack of a pen picture of Fr. Clancy - which you mention (Vol. 2,No. 5). The 'Memorials of the Irish Province of the Society for 1895' quotes the following from the 'Freeman's Journal (Sydney)', presumably Sept. 1895:- "During all the time he was head of St. Aloysius' College, Fr. Clancy enjoyed immense popularity. A kindly face, a soft speech, and a gentle manner enabled him to do what he liked with his pupils; but while never harsh his rule was firm, and he had the boys under perfect control. Outside the College Fr. Clancy was esteemed as an exemplary priest and a polished gentleman. He was on terms of warm personal friendship with the Right Hon. W.B. Dalley (two of whose sons he had under his care), the late W.A. Duncan, the late Sir Edward Strickland, and the late Eyre Ellis. He was a warm-hearted and patriotic Irishman." Fr. Dennett continues: "Fr. Clancy was in fact a remarkable man, who would be much better known but for his early death from cancer. He was used by Fr. Joseph Dalton S.J. in 1878 as a foundation member of the community at Xavier College. In the following year Fr. Dalton acceded to Dr. Vaughan's request for a Jesuit College in Sydney, and took with him Fr. Clancy to help in founding St. Aloysius' College. He remained Rector for more than ten years, and it was during this period that the Fellows of St. John's College in the University of Sydney chose him for their Rector - though he did not take office for reasons too long to explain ... In 1891 he was transferred to Xavier but it seems that the fatal disease had already taken hold, which killed him at the age of 59. His death place was Milltown, County Clare.
(Footprints, Vol. 2, No. 5)

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Fr David Strong SJ, The Australian dictionary of Jesuit biography 1848-2015, Second Edition, 2017:
Clancy, Daniel

Teacher, administrator; born Milltown Malbay, Co Clare, Ireland, 14 January 1836; died Melbourne, Victoria, 6 September 1895, aged 59.

Daniel Clancy entered the Society, 29 March 1861. As a scholastic he was prefect of discipline and in charge of the boys' library at Clongowes College, 1865-67. He studied theology at Louvain, and did his tertianship at Tronchiennes, Belgium. As a priest he was minister at Tullamore College, 1874-5 and then sent to Australia in 1877.

He was on the staff at Xavier College in 1878, and St Kilda House, Sydney, in 1879, becoming rector in 1880 and teaching mathematics.

In 1884 he was elected rector of St John's College, a position he occupied for only a few weeks. He did not take up his position because the fellows were not unanimous in electing him. He remained rector of St Aloysius' College until 1889, teaching, and with such duties as mission consultor, bursar, and prefect of discipline.

He was appointed to Xavier College from 1890 to 1893, and was at St Patrick's College, East Melbourne, as teacher and spiritual father until he died of cancer.

His students at St Aloysius’ College experienced him as a severe disciplinarian, even though his punishments were recognised as well deserved.

(Reproduced by permission of Fr David Strong SJ.)