Fraud opening religious community (7)
I believe the answer is:
convent
'religious community' is the definition.
(I've seen this before)
'fraud opening' is the wordplay.
'fraud' becomes 'con' (con is a kind of fraud).
'opening' becomes 'vent' (vent is a kind of opening).
'con'+'vent'='CONVENT'
(Other definitions for convent that I've seen before include "Nunnery" , "Building for prayer" , "Building for nuns" , "place for nuns" , "Religious house" .)