Mammal closely related to prairie dogs and chipmunks (6)

I believe the answer is:

marmot

(Other definitions for marmot that I've seen before include "Small burrowing animal of the squirrel family" , "wild rodent" , "Furry burrowing rodent" , "Stout, burrowing rodent" , "Large burrowing rodent" .)

I've seen this clue in The Times.

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