Get excited, start attack (4,2)
I believe the answer is:
turn on
I believe this is a triple definition!
'get excited' is the first definition.
'start' is the second definition.
(thesaurus)
'attack' is the third definition.
(thesaurus)
(Other definitions for turn on that I've seen before include "Cause of excitement" , "Excite -- activate" , "Set in operation" , "Attack without warning" , "Start; become hostile towards" .)