She's less than amenable (3)
I believe the answer is:
ena
'she's' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see an association between them that I can't see?
'less than amenable' is the wordplay.
'ENA' is hidden within the letters.
But, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for ena that I've seen before include "- - Sharples ('Coronation Street')" , "- - Sharples (TV)" , "First name of Coronation Street's Widow Sharples, d. 1980" .)