Actor Muni (4)
I believe the answer is:
paul
'actor muni' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for paul that I've seen before include "Peter - Rubens, Flemish painter" , "One of the apostles" , "- Newman, US actor" , "One of the Beatles" , "- Dombey (Dickens); - Jones, dance" .)