Become furious (3,3)
I believe the answer is:
see red
'become furious' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for see red that I've seen before include "Lose temper like enraged bull" , "Become angry (colloq.)" , "Be suddenly angry, as bull might" , "Become enraged" , "blow a gasket" .)