Devil's music causing damage (6)
I believe the answer is:
impair
'damage' is the definition.
(impairing is a kind of damaging)
'devil's music' is the wordplay.
'devil' becomes 'imp' (I've seen this before).
'music' becomes 'air' (air is a kind of music).
'imp'+'air'='IMPAIR'
'causing' is the link.
(Other definitions for impair that I've seen before include "Weaken, damage" , "blunt" , "Hinder" , "'Mar, spoil (6)'" , "Harm" .)