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Grizabella maybe right to leave Barrow (3)

Ross

I believe the answer is:

cat

I'm a little stuck... Click here to teach me more about this clue!

'barrow' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for cat that I've seen before include "A tom" , "Malicious gossip" , "eg Leopard" , "one's pyjamas? They're an excellent thing" , "Moggy" .)

I've seen this clue in The Times.
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