Street artist's with it and sound (6)
I believe the answer is:
strait
'sound' is the definition.
(I know that sound can be written as strait)
'street artist's with it' is the wordplay.
'street' becomes 'st' (abbreviation).
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'with' says to put letters next to each other.
'st'+'ra'+'it'='STRAIT'
'and' is the link.
(Other definitions for strait that I've seen before include "Inlet" , "Connecting passage of water" , "Narrow - artist (anag)" , "of Gibraltar, for example" , "Hardship - narrow passage of water" .)