It burrows down under (6)

I believe the answer is:

wombat

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'it burrows down under' is the definition.
The definition suggests a singular noun which matches the answer.

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(Other definitions for wombat that I've seen before include "Australian animal like small bear" , "Burrowing animal" , "Tailless marsupial down under" , "Australian resident" , "Bear-like marsupial" .)

I've seen this clue in the Evening Standard.

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