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All answers having "Maintained" as clue:

3 Character Answers:

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HAD

RAN



4 Character Answers:

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HELD

KEPT

SAID



6 Character Answers:

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ARGUED

AVOWED

HELDTO

KEPTUP

STATED

UPHELD



7 Character Answers:

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ALLEGED

AVERRED

CLAIMED

STUCKTO



8 Character Answers:

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ASSERTED

NURTURED

WELLKEPT



9 Character Answers:

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SUPPORTED