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All answers having "Dismisses" as clue:

4 Character Answers:

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AXES

CANS

LAYS



5 Character Answers:

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BOOTS

FIRES

OUSTS

SACKS



6 Character Answers:

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EXPELS

LETSGO



9 Character Answers:

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SENDSAWAY



10 Character Answers:

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SHOOTSDOWN



15 Character Answers:

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GIVESONETHESACK