Model done with this playboy (8)
I believe the answer is:
hedonist
'playboy' is the definition.
(I've seen this before)
'model done with this' is the wordplay.
'model' indicates anagramming the letters.
'with' means one lot of letters go next to another.
'done' after 'this' is 'thisdone'.
'thisdone' with letters rearranged gives 'HEDONIST'.
(Other definitions for hedonist that I've seen before include "A seeker after luxury" , "Thrill-seeker" , "One who believes in pleasure" , "Seeker of sensual pleasure" , "seeker of fun" .)