Burrower has reason to hide (6,8)

I believe the answer is:

ground squirrel

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'burrower' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's an association between them I don't understand?

'reason to hide' is the wordplay.
'reason' becomes 'ground' (synonyms).
'to hide' becomes 'squirrel' (I am not sure about this - if you are sure you should believe this answer much more).
'ground'+'squirrel'='GROUND-SQUIRREL'

'has' acts as a link.

Can you help me to learn more?

(Another definition for ground squirrel that I've seen is " rodent".)

I've seen this clue in The Daily Express.

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