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Nags Ali Baba and the Forty Thieves presumably (8)

Ross

I believe the answer is:

arabians

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'nags' is the definition.
The answer and definition can be both animals as well as being plural nouns.
Perhaps you can see a link between them that I can't see?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Another definition for arabians that I've seen is " horses".)

I've seen this clue in the Irish Times (Crosaire) and The Irish Times.
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