Penn in pictures (4)
I believe the answer is:
sean
'penn in pictures' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sean that I've seen before include "Penn, Bean or O'Casey" , "Irish form of John" , "- - Connery (007)" , "guy at Number 10 [IRISHMAN]" .)