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All answers having "Connect" as clue:

3 Character Answers:

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ADD

TIE



4 Character Answers:

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BIND

JOIN

LINK

MEET

MESH

SPAN

WELD

YOKE



5 Character Answers:

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TIEIN

TIEON

TIETO

TIEUP

UNITE



6 Character Answers:

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ATTACH

ENLINK

FASTEN

HOOKUP

LINKUP

PLUGIN

RELATE



7 Character Answers:

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HITCHUP



8 Character Answers:

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INTERTIE