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All answers having "Flagrant" as clue:

3 Character Answers:

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BAD



4 Character Answers:

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RANK



5 Character Answers:

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CRAVE

GROSS

OVERT



6 Character Answers:

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ARRANT



7 Character Answers:

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BLATANT

BRETONS

GLARING



8 Character Answers:

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CATARACT



9 Character Answers:

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EGREGIOUS



10 Character Answers:

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OUTRAGEOUS