She's less than amenable (3)
I believe the answer is:
ena
'she's' is the definition.
Both the answer and definition are singular nouns.
Perhaps you can see a link between them that I can't see?
'less than amenable' is the wordplay.
'less' indicates a hidden word (the clue less some of the letters in it).
'ENA' is hidden in the letters of 'than amenable'.
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" .)