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Perfect conditions for a customer's pastry requirement (5-3,5)

Ross

I believe the answer is:

apple-pie order

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

'perfect conditions for a customer's' is the definition.
I can't judge whether this definition defines the answer.

'pastry requirement' is the wordplay.
'pastry' becomes 'apple pie' (apple pie is a kind of pastry).
'requirement' becomes 'order' (I can't justify this - if you can you should believe this answer much more).
'applepie'+'order'='APPLE-PIE ORDER'

Can you help me to learn more?

(Other definitions for apple-pie order that I've seen before include "Perfect condition" , "Perfectly tidy" , "In which everything is neat and tidy" , "Perfect arrangement" , "Exceedingly neat and tidy condition" .)

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