Angry outburst (7)
I believe the answer is:
tantrum
'angry outburst' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tantrum that I've seen before include "Hissy fit" , "Childish fit of anger" , "Burst of rage" , "Childish fit of rage" , "Spoilt brat's fit" .)