Playwright Ben is hammered (5)
I believe the answer is:
ibsen
'playwright' is the definition.
(I know that Ibsen is a playwright)
'ben is hammered' is the wordplay.
'hammered' indicates an anagram (slang term for drunk).
'ben'+'is'='benis'
'benis' with letters rearranged gives 'IBSEN'.
(Other definitions for ibsen that I've seen before include "See 7 Down" , "Dramatist, author of Peer Gynt" , "Norwegian playwright, d. 1906" , "famous Norwegian" , "Norwegian dramatist of 'Hedda Gabler'" .)