Loud outcry or clamour (6)
I believe the answer is:
uproar
I believe this clue is a double definition.
'loud outcry' is the first definition.
(I've seen this before)
'clamour' is the second definition.
(I've seen this before)
(Other definitions for uproar that I've seen before include "Big noise" , "row" , "Hubbub, an outburst of angry noise" , "Chaos, violent outburst of noise" , "Public expression of outrage" .)