Crossword Genius

They don't represent a lot of money to a restaurateur! (5,2,5)

Ross

I believe the answer is:

stack of chips

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

'they don't represent a' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'lot of money to a restaurateur' is the wordplay.
I cannot really see how this works, but
'lot' could be 'stack' (synonyms) and 'stack' is found within the answer.
'of' could be 'o' and 'o' is found in the answer.
'money' could be 'p' and 'p' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in the Evening Standard.
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