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All answers having "Resolve" as clue:

3 Character Answers:

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SEW

VOW



4 Character Answers:

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IRON

WILL



5 Character Answers:

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IRONO

PARSE

SPINE

STEEL



6 Character Answers:

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ADJUST

DECIDE

METTLE

SETTLE



7 Character Answers:

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CLEARUP

IRONOUT



8 Character Answers:

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BACKBONE

SETTLEON



9 Character Answers:

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AGREEUPON

ARBITRATE

DETERMINE