 He was for some years curate of St. Gregory by St. Paul's, a post he seems to have resigned before September 1695, in which month he was succeeded by Charles Green.He was also chaplain to the Society of Serjeants' Inn, Fleet Street, London.In 1663 Clifford published the first edition of the work hy which he is best known, 'Divine Services and Anthems, usually sung in the Cathedrals and Collegiate Choires in the Church of England.'