Washerwoman? Not she! (3)
I believe the answer is:
her
'she' is the definition.
(I've seen this in other clues)
'washerwoman? not' is the wordplay.
'HER' is hidden within the letters.
However, I'm uncertain how this is indicated.
Can you help me to learn more?
(Other definitions for her that I've seen before include "Belonging to a female" , "In the Midlands she" , "That lady" , "Belonging to the woman" , "The female's" .)