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All answers having "Contrive" as clue:

4 Character Answers:

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BREW

PLAN

PLOT



5 Character Answers:

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FIXUP

FRAME

GINUP

HATCH



6 Character Answers:

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COOKUP

DESIGN

DEVISE

MANAGE

SCHEME



7 Character Answers:

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FASHION



8 Character Answers:

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ENGINEER



9 Character Answers:

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CONFUCIUS



10 Character Answers:

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BREASTBONE