In the south of France, an English member of the family (5)
I believe the answer is:
niece
'member of the family' is the definition.
(I've seen this in another clue)
'in the south of france an english' is the wordplay.
'in the' is an insertion indicator.
'south of france an' becomes 'nice' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'english' becomes 'e' (abbreviation).
'nice' placed around 'e' is 'NIECE'.
Can you help me to learn more?
(Other definitions for niece that I've seen before include "Preparation for curdling milk" , "Daughter of a sibling" , "Criminal" , "Family girl" , "Brother's daughter" .)