Painter's adult representation of sex acquired by religious scholar (5)
I believe the answer is:
david
'painter's' is the definition.
(I've seen this before)
'adult representation of sex acquired by religious scholar' is the wordplay.
'adult' becomes 'a' (abbreviation).
'representation of sex' becomes 'vi' (six in Roman numerals - 'sex' is 'six' in Latin).
'acquired by' is an insertion indicator.
'religious scholar' becomes 'dd' (abbreviation for Doctor of Divinity).
'a'+'vi'='avi'
'avi' inserted into 'dd' is 'DAVID'.
(Other definitions for david that I've seen before include "Boy's name" , "King of Judah and Israel, Saul's successor" , "The Psalmist" , "friend of Jonathan's?" , "Welsh saint - French painter" .)