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All answers having "Diversion" as clue:

3 Character Answers:

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TOY



4 Character Answers:

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GAME

PLAY

RUSE



5 Character Answers:

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SPORT



6 Character Answers:

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DETOUR

PSTIME



7 Character Answers:

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PASTIME



9 Character Answers:

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AMUSEMENT



10 Character Answers:

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RECREATION

RELAXATION

TIMEKILLER



12 Character Answers:

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BLACKCURRANT



13 Character Answers:

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ENTERTAINMENT