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All answers having "Under the table" as clue:

3 Character Answers:

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LIT



5 Character Answers:

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DRUNK

OILED



6 Character Answers:

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SNEAKY

SOTTED

TANKED



7 Character Answers:

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PIEEYED

SMASHED



9 Character Answers:

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CLAESTINE

FURTIVELY



11 Character Answers:

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CLANDESTINE