Curved line in music (4)

I believe the answer is:

slur

(Other definitions for slur that I've seen before include "Slight, insult" , "Insinuation, allegation" , "Discredit to one's reputation" , "Speak as drunk perhaps" , "Contentious allegation" .)

I've seen this clue in The Wall Street Journal, the Universal and the King Feature Syndicate.

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