Went on a tirade (6)
I believe the answer is:
ranted
'went on a tirade' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ranted that I've seen before include "Raved, mouthed off" , "Spoke wildly and foolishly" , "made long speech" , "Spoke wildly and loudly" , "Talked wildly and angrily" .)