French resort accommodating English relative (5)
I believe the answer is:
niece
'relative' is the definition.
(niece is a kind of relative)
'french resort accommodating english' is the wordplay.
'french resort' becomes 'nice' (I've seen this before).
'accommodating' is an insertion indicator.
'english' becomes 'e' (abbreviation).
'nice' placed around 'e' is 'NIECE'.
(Other definitions for niece that I've seen before include "Criminal" , "Family girl" , "girl further down the line" , "Female relation" , "Brother's daughter" .)