Terse report from survivor is out of control (4)
I believe the answer is:
amok
'is out of control' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for amok that I've seen before include "In an uncontrolled, often violent, way" , "Must run it" , "Berserk" , "going wild" , "Running wild" .)