Relative in French city, we hear (5)
I believe the answer is:
niece
'relative' is the definition.
(type of relative)
'french city we hear' is the wordplay.
'french city' becomes 'Nice' (Nice is a French city).
'we hear' indicates a 'sounds like' (homophone) clue.
'nice' sounds like 'NIECE'.
'in' acts as a link.
(Other definitions for niece that I've seen before include "Son's cousin" , "Family girl" , "One of the family" , "Female family member" , "Family relation" .)