Clagett was baptised at Canterbury on 16 December 1610, and in 1628 entered Merton College, Oxford, where he proceeded B.A. in October 1681. He then migrated to Magdalen Hall, and commenced M.A. in June 1634, reputed in philosophy.[1][2]
Clagett wrote: The Abuse of God's Grace; discovered in the Kinds, Causes, Punishments, Symptoms, Cures, Differences, Cautions, and other Practical Improvements thereof. Proposed as a seasonable check to the wanton Libertinisme of the present Age, Oxford, 1659,. It was dedicated to his "honoured cousin" William Clagot, and his "dear consort" the Lady Southcote.[1]