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All answers having "Matured" as clue:

4 Character Answers:

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AGED

GREW

RIPE



5 Character Answers:

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ADULT

GROWN



6 Character Answers:

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GREWUP



7 Character Answers:

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CAMEDUE

GROWNUP

RIPENED



8 Character Answers:

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SEASONED



9 Character Answers:

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CAMEOFAGE