Grammatical no-no

This time we are looking on the crossword clue for: Grammatical no-no.
it’s A 17 letters crossword puzzle definition. See the possibilities below.

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Possible Answers: AINT, RUNONSENTENCE, DOUBLENEGATIVE.

Last seen on: –Thomas Joseph – King Feature Syndicate Crossword – Mar 20 2020
Thomas Joseph – King Feature Syndicate Crossword – Jan 25 2019