Tumult, pandemonium (6)
I believe the answer is:
uproar
I believe this is a double definition.
'tumult' is the first definition.
(I know that tumult can be written as uproar)
'pandemonium' is the second definition.
(I've seen this in another clue)
(Other definitions for uproar that I've seen before include "Public expression of outrage" , "State of commotion or loud disturbance" , "Din, tumult" , "Tumult and bedlam" , "Brouhaha, commotion" .)