Sound sort of artist (6)
I believe the answer is:
strait
'sound' is the definition.
(strait is a kind of sound)
'sort of artist' is the wordplay.
'sort of' indicates an anagram.
'artist' is an anagram of 'STRAIT'.
(Other definitions for strait that I've seen before include "Difficult state for artist" , "Narrow strip of water between two larger ones" , "Difficulty - strict" , "Difficult position" , "Catch in a trap" .)