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All answers having "Pastime" as clue:

3 Character Answers:

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FUN



4 Character Answers:

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GAME



5 Character Answers:

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HOBBY

LIKEN

SPORT



6 Character Answers:

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ESCAPE

MANURE



7 Character Answers:

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PURSUIT



8 Character Answers:

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ACTIVITY



9 Character Answers:

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AVOCATION

DIVERSION