Crossword Genius

Neat within a valid requisition (2,4,5)

Ross

I believe the answer is:

in good order

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'neat within a valid requisition' is the definition.
I can't tell whether this defines the answer.

'within a valid requisition' is the wordplay.
'within' becomes 'in'.
'a valid' becomes 'good' (I've seen this in another clue).
'requisition' becomes 'order' (I've seen this before).
'in'+'good'+'order'='IN GOOD ORDER'

Can you help me to learn more?

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