Woman in poem, 'Maud' (4)
I believe the answer is:
emma
'woman' is the definition.
'in poem maud' is the wordplay.
'in' indicates the answer is hidden within the clue.
'EMMA' can be found hidden inside 'poem maud'.
(Other definitions for emma that I've seen before include "Jane Austen novel and Nelson's lover" , "Flaubert's heroine" , "Titled heroine" , "Jane Austen work - Ms Bunton, former Baby Spice" , "Madame Bovary, perhaps" .)