Actor Rickman (4)
I believe the answer is:
alan
'actor rickman' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for alan that I've seen before include "Messrs Ladd and Dukes" , "- Bennett, English actor, dramatist, writer" , "English name" , "- Ayckbourn, English playwright" , "One of Robin Hood's men was - a Dale" .)