Race anger? (4)
I believe the answer is:
heat
This clue is a double definition.
'race' is the first definition.
(thesaurus)
'anger?' is the second definition.
(thesaurus)
(Other definitions for heat that I've seen before include "Get agitated" , "Energy that causes a rise in temperature" , "Warm up" , "Raise temperature" , "Preliminary round in a contest" .)