Exclude acoustic covers (4)
I believe the answer is:
oust
'exclude' is the definition.
(thesaurus)
'acoustic covers' is the wordplay.
'covers' says the answer is hidden in the clue (I've seen 'covered' mean this (the answer is covered up by the clue)).
'OUST' is hidden in the letters of 'acoustic'.
(Other definitions for oust that I've seen before include "Drive out, eject from office" , "Remove and replace" , "Get rid of" , "responsible for expulsions" , "Remove from a position of power" .)