Charlie leaves a preliminary exam in a frenzy (4)

I believe the answer is:

amok

I'm a little stuck... Click here to teach me more about this clue!

'in a frenzy' is the definition.
(I've seen this in another clue)

I can't explain the remainder of the clue.

(Other definitions for amok that I've seen before include "Going mad" , "going wild" , "(Run) wild, out of control" , "Wild and uncontrollable" , "Frenzied, running out of control" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app