The music coming from birds? The opposite! (4)
I believe the answer is:
emus
'birds? the opposite' is the definition.
'emus' can be an answer for 'birds?' (I've seen this before). I'm unsure of the 'the opposite' bit.
'the music coming from' is the wordplay.
'from' indicates the answer is hidden within the clue.
'EMUS' is hidden in the letters of 'the music coming'.
Can you help me to learn more?
(Other definitions for emus that I've seen before include "Largest native Australian birds" , "Muse about flightless Australian birds" , "laboratory units" , "Aussie birds" , "Fast, but not high-fliers" .)