Crossword Genius

Get rid of croupier, a rubbish businessman (5,6)

Ross

I believe the answer is:

scrap dealer

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

'croupier a rubbish businessman' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'get rid of' is the wordplay.
I cannot really understand how this works, but
'get rid of' could be 'scrap' (I've seen this before) and 'scrap' is present in the answer.
The remaining letters 'dealer' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Mirror.
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