Crossword Genius

Faux pas (4)

Ross

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5 7 8 4,2

(Other definitions for nono that I've seen before include "Failure (colloq.)" , "Something that must not be done (informal)" , "Impossibility" , "Non-starter (colloq.)" , "Unacceptable thing" .)

I've seen this clue in the Universal, the Penny Press, the King Feature Syndicate and the Sydney Morning Herald.
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