Sort of money put aside for the newsboy? (5)

I believe the answer is:

paper

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

'aside for the newsboy?' is the definition.
I can't tell whether this definition defines the answer.

'sort of money put' is the wordplay.
'sort of money' becomes 'pa' (I can't explain this - if you can you should give a lot more credence to this answer).
'put' becomes 'per'.
'pa'+'per'='PAPER'

Can you help me to learn more?

(Other definitions for paper that I've seen before include "Written essay" , "Daily publication" , "First wedding anniversary" , "Treatise" , "News medium" .)

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

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