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All answers having "Traces" as clue:

4 Character Answers:

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TADS



5 Character Answers:

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HINTS

IOTAS

SIGNS

WISPS



6 Character Answers:

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SPECKS

STRAPS

TINGES



7 Character Answers:

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TINGLES



8 Character Answers:

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REMNANTS

SOUPCONS

VESTIGES



9 Character Answers:

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TINCTURES



10 Character Answers:

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SCINTILLAS