Dislike a particular form (8)
I believe the answer is:
aversion
'dislike' is the definition.
(aversion is a kind of dislike)
'a particular form' is the wordplay.
'particular form' becomes 'version' (I've seen this before).
'a'+'version'='AVERSION'
(Other definitions for aversion that I've seen before include "A version of strong dislike" , "serious dislike" , "phobia" , "distaste" , "A strong dislike for something - turn away from it" .)