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All answers having "Unit of length" as clue:

3 Character Answers:

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ELL

ERA

MIL

ROD



4 Character Answers:

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FOOT

HEED

INCH

JIBE

MILE

PACE

SING

YARD



5 Character Answers:

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ATLAS

METER

METRE



7 Character Answers:

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CLOYING



9 Character Answers:

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BEAUTIFUL



10 Character Answers:

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CENTIMETRE

MILLIMETRE



11 Character Answers:

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MOTHERGOOSE