Crossword Genius

Fraud men chose, zip being possible outcome (5,6)

Ross

I believe the answer is:

ponzi scheme

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

'fraud men chose zip' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'possible outcome' is the wordplay.
I cannot quite see how this works, but
'possible' could be 'on' ('not on' can mean unacceptable or not possible) and 'on' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

'being' is the link.

Can you help me to learn more?

I've seen this clue in The Telegraph.
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