Dislike actor's first reading (8)
I believe the answer is:
aversion
'dislike' is the definition.
(aversion is a kind of dislike)
'actor's first reading' is the wordplay.
'actor's first' becomes 'a' (1st letter of 'actor').
'reading' becomes 'version' (a reading can be an interpretation or version).
'a'+'version'='AVERSION'
(Other definitions for aversion that I've seen before include "Feeling of intense dislike" , "an object of dislike" , "A strong dislike or repugnance" , "serious dislike" , "Disgust" .)