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All answers having "Nod" as clue:

3 Character Answers:

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BID

CUE

ERR

NAP

YES



4 Character Answers:

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DOZE

EAST

SIGN

SSNT



5 Character Answers:

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BOWTO



6 Character Answers:

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ASSENT

CATNAP

DROWSE

SIGNAL

SNOOZE



7 Character Answers:

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DOZEOFF

DROPOFF

GOAHEAD



9 Character Answers:

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AGREEMENT

DREAMLAND