Averse to change between sides in volte-face (8)
I believe the answer is:
reversal
'volte-face' is the definition.
('reversal' can be a synonym of 'volte-face')
'averse to change between sides' is the wordplay.
'to change' is an anagram indicator.
'between' is an insertion indicator.
'sides' becomes 'rl' (I've seen this in other clues).
'averse' with letters rearranged gives 'eversa'.
'eversa' placed inside 'rl' is 'REVERSAL'.
'in' acts as a link.
(Other definitions for reversal that I've seen before include "Set back" , "Negation" , "Change of fortune" , "change for the worse" , "complete change" .)