Anger or wrath
I believe the answer is:
ire
I believe this clue is a double definition.
'anger' is the first definition.
(ire is intense rage)
'wrath' is the second definition.
(both can mean anger)
(Other definitions for ire that I've seen before include "passionate feeling" , "Fury" , "heat" , "Strong feeling" , "Anger, annoyance" .)