Angry man had died (6)
I believe the answer is:
heated
'angry' is the definition.
(I've seen this before)
'man had died' is the wordplay.
'man' becomes 'he' ().
'had' becomes 'ate' (e.g. I had an ice cream).
'died' becomes 'd'.
'he'+'ate'+'d'='HEATED'
(Other definitions for heated that I've seen before include "Inflamed with passion" , "Furious" , "Angry - passionate" , "Raised the temperature" , "Fired-up" .)