Not at all a feature of fine verse (5)
I believe the answer is:
never
'not at all' is the definition.
(I've seen this before)
'a feature of fine verse' is the wordplay.
'a feature of' indicates a hidden word.
'NEVER' is hidden in the letters of 'fine verse'.
(Other definitions for never that I've seen before include "On no occasion" , "'It's now or - - ' (14 song)" , "Not ever" , "I refuse" , "Under no circumstances" .)