Overwhelm with noise (6)
I believe the answer is:
deafen
'overwhelm with noise' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for deafen that I've seen before include "Deprive of hearing" , "Overwhelm with sound" , "Cause loss of hearing to (someone)" , "Be unbearably loud" , "Make unable to hear" .)