Bad-mouth (6)
'bad-mouth' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dis that I've seen before include "Name for Pluto or hell" , "Speak to (someone)without respect" , "Treat without respect - god of the underworld" , "soul venue" , "Speak disrespectfully to (colloq.)" .)
'bad-mouth' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for revile that I've seen before include "Vilify" , "Upbraid or abuse" , "Run down" , "Criticise - abuse" , "Upbraid, berate" .)