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All answers having "Destroys" as clue:

4 Character Answers:

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ZAPS



5 Character Answers:

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RASES

RAZES

RUINS

SLAYS



6 Character Answers:

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BLASTS

ERASES

SHREDS

TOTALS

WRECKS



7 Character Answers:

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DEVOURS

TRASHES

UNMAKES



8 Character Answers:

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LOUSESUP

RUINATES

SHATTERS



9 Character Answers:

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DECIMATES

TEARSDOWN