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All answers having "Cast off" as clue:

3 Character Answers:

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RID



4 Character Answers:

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EMIT

JILT

MOLT

SAIL

SHED



5 Character Answers:

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EGEST

FLING

SCRAP

SLUFF



6 Character Answers:

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DISOWN

SLOUGH

UNMOOR



7 Character Answers:

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SETSAIL



8 Character Answers:

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SLOUGHED