Clergyman from inside a convent (6)
I believe the answer is:
deacon
'clergyman' is the definition.
(I know that deacon is a type of clergyman)
'from inside a convent' is the wordplay.
'from' says the answer is hidden in the clue.
'DEACON' is hidden in the letters of 'inside a convent'.
(Other definitions for deacon that I've seen before include "Church post" , "Minister below a priest" , "A member of the lower orders of clergy" , "Church minister" , "Priest's assistant" .)