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All answers having "Hindrance" as clue:

3 Character Answers:

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BAR

LET

RUB



4 Character Answers:

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CLOG

DRAG

SNAG



5 Character Answers:

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CRAMP

CRIMP



6 Character Answers:

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MORASS



7 Character Answers:

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BARRIER

DELAYER

PORTICO



8 Character Answers:

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DRAWBACK

OBSTACLE



9 Character Answers:

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DETERMENT

DETERRENT

LIABILITY



10 Character Answers:

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CONSTRAINT

IMPEDIMENT



11 Character Answers:

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OBSTRUCTION