Jumble of removed paper with nothing to finish (7)

I believe the answer is:

farrago

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'jumble' is the definition.
(I've seen this before)

'removed paper with nothing to finish' is the wordplay.
'removed paper with' becomes 'farra' (I can't justify this - if you can you should give a lot more credence to this answer).
'finish' suggests the final letters.
The last letters of 'nothing to' are 'go'.
'farra'+'go'='FARRAGO'

'of' is the link.

Can you help me to learn more?

(Other definitions for farrago that I've seen before include "Confused mass" , "Disorderly mixture" , "Confusion" , "Mix" , "Motley assortment of things" .)

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

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