One of the family on the French Riviera we hear (5)
I believe the answer is:
niece
'one of the family' is the definition.
(I've seen this in another clue)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for niece that I've seen before include "[PRIEST'S] daughter?" , "Brother or sister's daughter" , "Brother's daughter" , "Brother's girl" , "Criminal" .)