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All answers having "Corrupts" as clue:

4 Character Answers:

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ROTS



6 Character Answers:

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BRIBES

TAINTS



7 Character Answers:

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DEBASES

POISONS

SULLIES



8 Character Answers:

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ATTAINTS

DEGRADES

DEPRAVES

SUBVERTS



9 Character Answers:

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VENALIZES