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All answers having "Chills" as clue:

4 Character Answers:

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AGUE

ICES

NIPS



5 Character Answers:

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AGUES

COOLS

HANGS

RESTS



6 Character Answers:

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DETERS



7 Character Answers:

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COOLSIT

RELAXES

SHIVERS



8 Character Answers:

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HANGSOUT



9 Character Answers:

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VEGGESOUT