Frenchwoman’s mother in West? (6)
I believe the answer is:
madame
'frenchwoman's' is the definition.
(I've seen this before)
'mother in west?' is the wordplay.
'mother' becomes 'dam' (female parent of an animal).
'in' means one lot of letters goes inside another.
'west?' becomes 'mae' (actress Mae West).
'dam' going into 'mae' is 'MADAME'.
(Other definitions for madame that I've seen before include "A French-speaking woman" , "French Mrs" , "Woman of refinement" , "Title for a Frenchwoman" , "Flaubert novel" .)