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All answers having "Proposes" as clue:

4 Character Answers:

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ASKS



5 Character Answers:

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MOVES



6 Character Answers:

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OFFERS

POSITS



7 Character Answers:

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INTENDS



8 Character Answers:

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SUGGESTS



9 Character Answers:

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NOMINATES

SETSFORTH



15 Character Answers:

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POPSTHEQUESTION