Device used to muffle the sound of a musical instrument (4)

I believe the answer is:

mute

(Other definitions for mute that I've seen before include "Silent or speechless" , "Violin clamp; type of swan" , "Speechless, soundless" , "Silent, refraining from speaking" , "Unspeaking" .)

I've seen this clue in The Mirror.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.