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All answers having "Burrowing rodent" as clue:

4 Character Answers:

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MOLE

PACA

VOLE



6 Character Answers:

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AGOUTI

GERBIL

GOPHER

MARMOT



7 Character Answers:

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HAMSTER

MOLERAT



8 Character Answers:

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CHIPMUNK



10 Character Answers:

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PRAIRIEDOG