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All answers having "Sure things" as clue:

4 Character Answers:

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EGGS



7 Character Answers:

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CINCHES

ROLLONS

SHOOINS



8 Character Answers:

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SAFEBETS



9 Character Answers:

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CAKEWALKS

SLAMDUNKS



13 Character Answers:

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DEATHANDTAXES



15 Character Answers:

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ANTIPERSPIRANTS