Crossword Genius

What one may pay for purchases from cat shops? (4,4)

Ross

I believe the answer is:

spot cash

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'what one may pay for purchases' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'from cat shops?' is the wordplay.
'from' indicates anagramming the letters (the anagram comes from the same letters).
'cat'+'shops'='catshops'
'catshops' with letters rearranged gives 'SPOT CASH'.

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I've seen this clue in The Globe and Mail.
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