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All answers having "Puzzles" as clue:

5 Character Answers:

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POSES

VEXES



6 Character Answers:

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POSERS



7 Character Answers:

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ENIGMAS

RIDDLES



8 Character Answers:

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BAFFLERS

PROBLEMS



9 Character Answers:

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ACROSTICS

PERPLEXES



10 Character Answers:

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CONUNDRUMS



11 Character Answers:

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BAFFLEMENTS