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All answers having "Go nuts" as clue:

3 Character Answers:

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APE

WIG



4 Character Answers:

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FLIP

RAGE

RANT

RAVE

SNAP



5 Character Answers:

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ERUPT



6 Character Answers:

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LOSEIT



7 Character Answers:

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FLIPOUT

RAMPAGE

RUNAMOK

RUNWILD



8 Character Answers:

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LETLOOSE