Actor Schwarzenegger (6)
I believe the answer is:
arnold
'actor schwarzenegger' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for arnold that I've seen before include "Headmaster, poet or composer" , "-- Wesker, playwright" , "Essayist" , "Sir Malcolm -, English composer" , "Another poet" .)