Character's parking technique (4)
I believe the answer is:
part
'character's' is the definition.
('part' can be a synonym of 'character')
'parking technique' is the wordplay.
'parking' becomes 'p'.
'technique' becomes 'art' (I've seen this in other clues).
'p'+'art'='PART'
(Other definitions for part that I've seen before include "Divide; role" , "Portion of a whole" , "Component; divide" , "unemployed actor hopes for" , "Fraction of the whole - separate" .)