Crossword Genius

Money-spinner doesn't include Merinos - that's just loose change? (5)

Ross

I believe the answer is:

penny

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

'money' is the definition.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for penny that I've seen before include "Girl" , "Denarius" , "One hundredth of a pound" , "Lancaster" , "Little bit of 18" .)

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