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All answers having "Line" as clue:

3 Character Answers:

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DEW

ROW



4 Character Answers:

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CORD

FILE

ITEM

NILE

ROPE

STAG



5 Character Answers:

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CONGA

LYRIC

PARTY

QUEUE

TRADE



6 Character Answers:

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CAREER

CREASE

DOTTED

DRIVES

STREAK

STRIPE

TOETHE



7 Character Answers:

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TOESTHE

WRINKLE



8 Character Answers:

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BUSINESS

VOCATION



10 Character Answers:

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FAMILYTREE

PROFESSION



14 Character Answers:

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BOOKMAKERSODDS

CHORUSENSEMBLE



15 Character Answers:

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ELEVATEDRAILWAY

INSINCERECOMEON

PHONECONNECTION

ROPEORSHORTNOTE

ROPEUSEDONASHIP

THEATERDELIVERY