Allen or Lawrence (5)
I believe the answer is:
steve
'allen or lawrence' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for steve that I've seen before include "Stephen (abbrev.)" , "Byers, to his friends" , "- Reich; - Biko" , "Sir - - Redgrave (oarsman)" , "- McQueen, US actor" .)