Vocal outburst (4)
I believe the answer is:
yell
'vocal outburst' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for yell that I've seen before include "Clement --, politician" , "Shout loudly" , "Loud sharp cry" , "Bawl, yowl" , "Call out" .)