Prince seen in French city after church (7)
I believe the answer is:
charles
'prince' is the definition.
(Prince Charles)
'french city after church' is the wordplay.
'french city' becomes 'arles' (city in France).
'after' means one lot of letters go next to another.
'church' becomes 'ch' (common abbreviation).
'arles' after 'ch' is 'CHARLES'.
'seen in' is the link.
(Other definitions for charles that I've seen before include "- Darwin; - Dickens" , "27 [PRINCE]" , "- Kingsley (The Water Babies)" , "Caroline king" , "Man's name" .)