Washerwoman? Not her! (3)
I believe the answer is:
she
'her' is the definition.
(thesaurus)
'washerwoman? not' is the wordplay.
'SHE' is hidden in amongst the letters.
But, I'm unsure how this is indicated.
Can you help me to learn more?
(Other definitions for she that I've seen before include "fiction" , "Female pronoun" , "H. Rider Haggard novel" , "Book" , "Rider's novel" .)