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All answers having "Exploded" as clue:

4 Character Answers:

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BLEW

WENT



5 Character Answers:

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BURST

RAGED



6 Character Answers:

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BLEWUP

BOOMED

POPPED



7 Character Answers:

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BLASTED

BLOWNUP

ERUPTED

WENTOFF



9 Character Answers:

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BLEWAPART

DETONATED