Sound artist out (6)
I believe the answer is:
strait
'sound' is the definition.
(strait is a kind of sound)
'artist out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'artist' with letters rearranged gives 'STRAIT'.
(Other definitions for strait that I've seen before include "Narrow sort of traits (6)" , "Narrow stretch of water as at Gibraltar" , "Hardship - narrow passage of water" , "Narrow channel of the sea joining two larger bodies of water" , "-- -laced (prudish)" .)