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All answers having "Blast" as clue:

3 Character Answers:

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DIN

GAS

RAP

ZAP



4 Character Answers:

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BAJA

BALL

BANG

DAMN

DRAT

GUST

HOOT

OATH

RATS

TOOT



5 Character Answers:

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BLARE

SALVO

SCALD



6 Character Answers:

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DANGIT

DARNIT



7 Character Answers:

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FUNTIME



8 Character Answers:

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GOODTIME

UNLOADON

WINGDING



9 Character Answers:

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EXCORIATE



14 Character Answers:

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RIPROARINGTIME