Disparage, defame (7)
I believe the answer is:
traduce
This clue is a double definition.
'disparage' is the first definition.
(thesaurus)
'defame' is the second definition.
(traduce means to defame or misrepresent)
(Other definitions for traduce that I've seen before include "Speak badly of" , "Slander - misrepresent" , "Tell lies about (someone)" , "Misrepresent in unfavourable way" , "Asperse" .)