Woodworking, find fault with door? (9)
I believe the answer is:
carpentry
'woodworking' is the definition.
(synonyms)
'find fault with door?' is the wordplay.
'find fault' becomes 'carp' (I've seen this before).
'with' says to put letters next to each other.
'door?' becomes 'entry' ('entry' can be a synonym of 'door').
'carp'+'entry'='CARPENTRY'
(Other definitions for carpentry that I've seen before include "Joining work" , "The purpose of chips" , "Woodwork" , "Manipulating deal, perhaps" , "Craft of a woodworker" .)