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All answers having "Funny guy" as clue:

3 Character Answers:

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WAG

WIT



4 Character Answers:

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CARD

HOOT

RIOT



5 Character Answers:

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JOKER

PANIC



6 Character Answers:

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SCREAM



8 Character Answers:

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QUIPSTER



10 Character Answers:

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STEVEALLEN



11 Character Answers:

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PHILSILVERS