Rude-sounding vocalist (4)
I believe the answer is:
bass
'vocalist' is the definition.
(bass is a kind of vocalist)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for bass that I've seen before include "Deep-toned" , "Lowest register of the male voice" , "Fish; male singing voice" , "Fish; deep voice" , "A fish, or the lowest pitch in music" .)