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All answers having "Ambiguous" as clue:

3 Character Answers:

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LEA



4 Character Answers:

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GRAY

HAZY



5 Character Answers:

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VAGUE



7 Character Answers:

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DELPHIC

OBSCURE

UNCLEAR

VOUCHER



8 Character Answers:

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TWOEDGED



9 Character Answers:

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EQUIVOCAL

NECTARINE