Sir Laurence ---, actor (7)
I believe the answer is:
olivier
I believe this is a double definition.
'sir laurence' is the first definition.
(I've seen this in another clue)
'actor' is the second definition.
(Sir Laurence Olivier)
(Other definitions for olivier that I've seen before include "National Theatre's first artistic director, d. 1989" , "Classical actor" , "Great English actor playing rilievo" , "He starred in classic films of Hamlet and Henry V" , "Former acting lord" .)