Crossword Genius

Rule to which there can be no exception (6,5)

Ross

I believe the answer is:

strict order

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

'there can be no exception' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'rule to which' is the wordplay.
'rule' becomes 'order' (order is a kind of rule).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'which' becomes 'strict' (I can't justify this - if you can you should give a lot more credence to this answer).
'order' put after 'strict' is 'STRICT ORDER'.

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