Crazy way to run (4)
I believe the answer is:
amok
'crazy way to run' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for amok that I've seen before include "(Run) in frenzied state" , "Wild and uncontrollable" , "Running wild" , "Frenziedly" , "(Run) wild, out of control" .)