Adjust drape in church (6)
I believe the answer is:
change
'adjust' is the definition.
(thesaurus)
'drape in church' is the wordplay.
'drape' becomes 'hang'.
'in' is an insertion indicator.
'church' becomes 'ce' (abbreviation for Church of England).
'hang' put into 'ce' is 'CHANGE'.
(Other definitions for change that I've seen before include "Put on different clothes" , "Alter, convert" , "Best not to do it in 12" , "Money returned as balance after purchase" , "It's said to be as good as a rest" .)