Italian church affair (7)
I believe the answer is:
romance
'affair' is the definition.
(I've seen this in another clue)
'italian church' is the wordplay.
'italian' becomes 'Roman' (someone from Rome).
'church' becomes 'CE' (abbreviation for Church of England).
'roman'+'ce'='ROMANCE'
(Other definitions for romance that I've seen before include "fairy story?" , "Group of languages" , "Cameron (anag) - love story" , "(Wonderful) piece of fiction" , "Love-story" .)