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All answers having "Circle" as clue:

3 Character Answers:

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ORB

SET



4 Character Answers:

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AREA

CROP

DISC

GYRE

GYRO

HALO

HOOP

LOOP

RING



5 Character Answers:

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EVADE

INNER

ORBIT

POLAR

SHAPE



6 Character Answers:

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ARCTIC

ROTATE



7 Character Answers:

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ARRANGE

COTERIE

REVOLVE

RONDURE



9 Character Answers:

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TEMPTRESS



15 Character Answers:

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LITERARYSOCIETY

OUTSIDEOFAWHEEL