Raved (6)
I believe the answer is:
ranted
'raved' is the definition.
('rant' can be a synonym of 'rave')
This is all the clue.
(Other definitions for ranted that I've seen before include "Spoke wildly and loudly" , "Went off" , "Talked wildly and angrily" , "Spoke wildly and foolishly" , "made long speech" .)