Speak indistinctly, as a drunk might (4)

I believe the answer is:

slur

(Other definitions for slur that I've seen before include "Slight - drawl" , "Slight - aspersion" , "Contentious allegation" , "Pronounce indistinctly - discredit" , "Pronounce indistinctly or speak ill of" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.

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