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All answers having "Twits" as clue:

4 Character Answers:

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NITS

RIBS



5 Character Answers:

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ASSES

RIDES



6 Character Answers:

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IDIOTS

TAUNTS

TEASES

TWERPS



7 Character Answers:

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DERIDES

WRINKLE



10 Character Answers:

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POKESFUNAT