Pronounce indistinctly (4)
I believe the answer is:
slur
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pronounce indistinctly</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for slur that I've seen before include "Insinuation, allegation" , "Disparagement" , "Defamation" , "Pronounce indistinctly or speak ill of" , "Slight lack of distinction in speech" .)