Musicians who might create a racket (8)
I believe the answer is:
fiddlers
'musicians' is the definition.
(fiddler is a kind of musician)
'might create a racket' is the wordplay.
I cannot quite understand how this works, but
'racket' could be 'fiddle' (both can mean a scam) and 'fiddle' is present in the answer.
This explanation may well be incorrect...
'who' acts as a link.
Can you help me to learn more?
(Other definitions for fiddlers that I've seen before include "Tinkerers or violinists" , "Old King Cole's trio" .)