Repugnance (8)
I believe the answer is:
aversion
'repugnance' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for aversion that I've seen before include "Extreme dislike" , "Strong dislike for, makes you look away" , "Feeling of intense dislike" , "A strong dislike or antipathy" , "A version of strong dislike" .)