Speak badly of (7)
I believe the answer is:
traduce
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">speak badly of</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for traduce that I've seen before include "Speak ill of" , "Defame, slander" , "Malign -- rude act (anag)" , "'Malign, badmouth (7)'" , "Misrepresent in unfavourable way" .)