Mouse or squirrel for instance (6)

I believe the answer is:

rodent

(Other definitions for rodent that I've seen before include "Placental mammal having a single pair of incisor, 'gnawing', teeth" , "A rat, for instance" , "Small gnawing animal" , "Creature such as a rat" , "Nibbler" .)

I've seen this clue in the Sydney Morning Herald.

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