Sound feature, I accepted (5)
I believe the answer is:
noise
'sound' is the definition.
(a noise is a sound)
'feature i accepted' is the wordplay.
'feature' becomes 'nose' (I've seen this before).
'accepted' is an insertion indicator.
'nose' placed around 'i' is 'NOISE'.
(Other definitions for noise that I've seen before include "Commotion" , "Unstructured sound" , "Loud sound; bruit" , "Racket, din" , "Unpleasant sounds" .)