Would Dad buy things from a pawnbroker? (3-4)

I believe the answer is:

pop-shop

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

'a pawnbroker?' is the definition.
Both the answer and definition are singular nouns.
Maybe there's an association between them I don't understand?

'would dad buy things' is the wordplay.
'would dad' becomes 'pop' (I can't explain this - if you can you should believe this answer much more).
'buy things' becomes 'shop' (I've seen this in another clue).
'pop'+'shop'='POP-SHOP'

'from' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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