Agent isn't finished with that man consumed by guilt? God dammit! (9)
I believe the answer is:
blaspheme
'agent isn't finished with' is the definition.
I can't tell whether this definition defines the answer.
'man consumed by guilt? god dammit' is the wordplay.
I cannot really understand how this works, but
'man' could be 'em' and 'em' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'that' acts as a link.
Can you help me to learn more?
(Other definitions for blaspheme that I've seen before include "Curse, profane" , "Say irreverent things about God" , "Speak profanely" , "Talk irreverently about God and sacred things" , "Utter obscenities or profanities" .)