French resort entertaining English relative (5)
I believe the answer is:
niece
'relative' is the definition.
(type of relative)
'french resort entertaining english' is the wordplay.
'french resort' becomes 'nice' (French coastal resort).
'entertaining' is an insertion indicator (inviting in, as for dinner).
'english' becomes 'E' (abbreviation as in OED).
'nice' going around 'e' is 'NIECE'.
(Other definitions for niece that I've seen before include "Daughter of a sibling" , "Brother or sister's daughter" , "A sibling's child" , "Brother's daughter" , "A sibling's daughter" .)