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All answers having "Entrances" as clue:

3 Character Answers:

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INS



5 Character Answers:

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ADITS

DOORS

GATES



6 Character Answers:

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CHARMS

INLETS



7 Character Answers:

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PORTALS



8 Character Answers:

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ACCESSES



9 Character Answers:

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BEWITCHES



10 Character Answers:

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THRESHOLDS