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All answers having "Wear out" as clue:

4 Character Answers:

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DOIN

FRAY

JADE

TIRE



5 Character Answers:

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ERODE

SPEND



6 Character Answers:

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TELLON

TUCKER



7 Character Answers:

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EXHAUST

FATIGUE

OVERUSE

USEALOT



8 Character Answers:

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ENERVATE