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All answers having "Pass on" as clue:

3 Character Answers:

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DIE



4 Character Answers:

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SEND

SKIP



5 Character Answers:

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COLON

HASTY

RELAY



6 Character Answers:

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CONVEY

EXPIRE

FOREGO

IMPART

PERISH

REGIFT

REPEAT

SITOUT



7 Character Answers:

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DECEASE

DEVOLVE

OFFLOAD



8 Character Answers:

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BEQUEATH

DELEGATE

TRANSMIT