French resort entertaining English family member (5)
I believe the answer is:
niece
'family member' is the definition.
(I know that family member can be written as niece)
'french resort entertaining english' is the wordplay.
'french resort' becomes 'nice' (French coastal resort).
'entertaining' indicates putting letters inside.
'english' becomes 'e' (abbreviation).
'nice' going around 'e' is 'NIECE'.
(Other definitions for niece that I've seen before include "A younger female relative" , "Kinswoman" , "A sibling's daughter" , "member of different generation" , "Brother's girl" .)