"The Picture of __ Gray" (6)
I believe the answer is:
(Other definitions for dorian that I've seen before include "Oscar Wilde wrote 'The Picture of ...... Grey'" , "Oscar Wilde wrote 'The Picture of . . . . . . Gray'" , "Oscar Wilde novel: ''The Picture of . . . . . . Gray''" , "Oscar Wilde's novel ` `The Picture of ...... Gray' '" .)