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All answers having "Lip" as clue:

3 Character Answers:

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RHO

RIM



4 Character Answers:

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BALM

BRIM

EDGE

GUFF

SASS

SYNC

TUDE



5 Character Answers:

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BRINK

CHEEK

GLOSS

LEDGE

MOUTH

ROUGE

SAUCE

SYNCH

SYNCS



6 Character Answers:

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LABRUM



8 Character Answers:

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BACKTALK

RUDENESS



10 Character Answers:

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EMBOUCHURE



12 Character Answers:

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IMPERTINENCE



14 Character Answers:

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PARTIALECLIPSE