Author Oscar ____ (5)
I believe the answer is:
wilde
'author oscar' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for wilde that I've seen before include "Oscar or Kim?" , "Oscar --, playwright, wit and author" , "Oscar --, writer and wit" , "Irish wit and playwright" , "Author of The Picture of Dorian Gray" .)