Bow tie for an artist (7)
I believe the answer is:
painter
I believe this clue is a double definition.
'bow tie' is the first definition.
(I've seen this before)
'an artist' is the second definition.
(painter is a kind of artist)
'for' acts as a link.
(Other definitions for painter that I've seen before include "Bow tie" , "craft tied up with this" , "Rope; decorator" , "What Rolf Harris was allowed to do" , "Line attached to the bow of a boat when tying up" .)