English playwright (6,6)
'english playwright' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for shakespeare that I've seen before include "English poet" , "Author of Hamlet" , "See 12" , "No 1 poet" , "The Swan of Avon" .)
(Another definition for harold pinter that I've seen is " Playwright - pardon Hitler (anag)".)