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All answers having "Folds" as clue:

4 Character Answers:

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LAPS

PENS



5 Character Answers:

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CAVES

PLIES

TUCKS



6 Character Answers:

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KNEADS

PLEATS



7 Character Answers:

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CREASES

GOESDER

RIMPLES



9 Character Answers:

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ENDSAHAND

FLECTIONS

GOESUNDER