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All answers having "Seeing red" as clue:

3 Character Answers:

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MAD



4 Character Answers:

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IRED

SORE



5 Character Answers:

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ANGRY

IRATE

LIVID

OWING

RILED



6 Character Answers:

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INDEBT



7 Character Answers:

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ENRAGED

INARAGE



10 Character Answers:

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BOILINGMAD