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All answers having "Kind of shoe" as clue:

3 Character Answers:

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GUM

PAC

TAP

TOE



4 Character Answers:

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PUMP



5 Character Answers:

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FLATS

SABOT



6 Character Answers:

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BROGUE

SADDLE

SANDAL

TSTRAP



7 Character Answers:

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OPENTOE

SNEAKER

TOELESS



8 Character Answers:

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ELEVATOR