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All answers having "Extended" as clue:

3 Character Answers:

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RAN



4 Character Answers:

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LAIN

LENT

LONG



5 Character Answers:

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POKED

UNCUT



6 Character Answers:

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RANGED



7 Character Answers:

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ADDEDON

OFFERED

REACHED

RENEWED

SPLAYED



8 Character Answers:

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DRAWNOUT

LONGTERM



9 Character Answers:

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ADDEDONTO

PROLONGED