It's quite proper for everyone in a monastery (3,2,5)

I believe the answer is:

all in order

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'a monastery' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'it's quite proper for everyone in' is the wordplay.
'it's quite proper' becomes 'order' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'for' means one lot of letters go next to another (I've seen this in other clues).
'everyone' becomes 'all' (all people).
'all'+'in'='allin'
'order' put after 'allin' is 'ALL IN ORDER'.

Can you help me to learn more?

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

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