Wodehouse's Wooster (6)
I believe the answer is:
bertie
'wodehouse's wooster' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bertie that I've seen before include "- Wooster (Wodehouse)" , "The familiar Mr Ahern, former Taoiseach" , "... Ahern, FF politician" , "The familiar Irish Taoiseach" , "The familiar or informal Taoiseach" .)