French resort accommodates English relative (5)
I believe the answer is:
niece
'relative' is the definition.
(type of relative)
'french resort accommodates english' is the wordplay.
'french resort' becomes 'nice' (French coastal resort).
'accommodates' means one lot of letters goes inside another.
'english' becomes 'e' (abbreviation).
'nice' going around 'e' is 'NIECE'.
(Other definitions for niece that I've seen before include "Kinswoman" , "Female relation" , "Criminal" , "Family relative" , "member of different generation" .)