Crossword Genius

What John, George and Ringo share in odd ruse to make money (5)

Ross

I believe the answer is:

euros

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

'money' is the definition.
(I know that Euros is a unit of money)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for euros that I've seen before include "Rouse (anag.)" , "currency in Greece" , "Continental currency units" , "money" , "EU currency" .)

I've seen this clue in The Guardian.
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