Loud confused noise from many sources (6)
I believe the answer is:
hubbub
'loud confused noise from many sources' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for hubbub that I've seen before include "A lot of noise" , "Noisy commotion and din" , "Mild uproar" , "Loud confused noise of voices" , "Lots of noise and loud voices" .)