Actor in a rumpled mac (8)
I believe the answer is:
'mac' is the definition.
(macintosh is a type of raincoat)
'actor in a rumpled' is the wordplay.
'rumpled' indicates an anagram.
'actorina' anagrammed gives 'RAINCOAT'.
(Other definitions for raincoat that I've seen before include "Mackintosh" , "Catriona (anag.)" , "Protective garment for Croatian" , "Wet weather wear" , "protection against the elements" .)