Headshot promoting fiery agitators (8)
I believe the answer is:
hotheads
'agitators' is the definition.
(both can mean incendiary people)
'headshot promoting fiery' is the wordplay.
'headshot' can be anagrammed to 'HOTHEADS'.
Though, I am not sure how this is indicated.
(Other definitions for hotheads that I've seen before include "Impetuous folk" , "like a sound parachutist?" , "Impetuous irresponsible people" , "They don't think" , "Impetuous people with fiery temperaments" .)