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All answers having "Contact" as clue:

3 Character Answers:

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EYE

FAX



4 Character Answers:

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LENS

PAGE

POKE



5 Character Answers:

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EMAIL

RADIO

REACH

TOUCH

WRITE



6 Character Answers:

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LENSES



7 Character Answers:

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LIAISON



9 Character Answers:

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DROPALINE