Church official writing article in study (4)
I believe the answer is:
dean
'church official' is the definition.
(I've seen this before)
'article in study' is the wordplay.
'article' becomes 'a' (indefinite article).
'in' indicates putting letters inside.
'study' becomes 'den' (I've seen this before).
'a' going into 'den' is 'DEAN'.
'writing' is the link.
(Other definitions for dean that I've seen before include "Cathedral cleric" , "Torvill's ice dancing partner" , "James ..., film actor" , "One is in charge of a university department" , "Jonathan Swift's occupation" .)