Crossword Genius

Was very keen, say, to get Greek money (6)

Ross

I believe the answer is:

lepton

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

'greek money' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

'was very keen say to' is the wordplay.
I cannot really understand how this works, but
'to' is present in the answer.
This may be the basis of clue (or it may be nonsense).

'get' acts as a link.

Can you help me to learn more?

(Another definition for lepton that I've seen is " Subatomic particle".)

I've seen this clue in The Hindu.
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