Playwright penning article for artist (7)
I believe the answer is:
painter
'artist' is the definition.
(painter is a kind of artist)
'playwright penning article' is the wordplay.
'playwright' becomes 'pinter' (Harold Pinter).
'penning' means one lot of letters goes inside another.
'article' becomes 'a' (indefinite article).
'pinter' placed around 'a' is 'PAINTER'.
'for' is the link.
(Other definitions for painter that I've seen before include "What Rolf Harris was allowed to do" , "Sutherland?" , "creative type" , "Shipping line" , "Rope; decorator" .)