Absolute ruler's angry tirade after Troy gutted (6)
I believe the answer is:
tyrant
'absolute ruler's' is the definition.
(I've seen this before)
'angry tirade after troy gutted' is the wordplay.
'angry tirade' becomes 'rant' (I've seen this before).
'after' means one lot of letters go next to another.
'gutted' means to remove the middle letters (to gut something is to remove its insides).
'troy' with its middle taken out is 'ty'.
'rant' after 'ty' is 'TYRANT'.
(Other definitions for tyrant that I've seen before include "Harsh and absolute ruler" , "Arbitrary ruler" , "Totalitarian" , "Autocrat - bully" , "Oppressor" .)