Rodent of cold latitudes (7)

I believe the answer is:

lemming

(Other definitions for lemming that I've seen before include "One misjudges landing" , "Supposedly suicidal rodent" , "Rodent related to the vole" , "Northern rodent" , "Rodent to describe someone who rushes headlong to destruction" .)

I've seen this clue in The Times.

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