US state confusion interrupted by new sense of order (8)

I believe the answer is:

calmness

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'sense of order' is the definition.
'calmness' can be an answer for 'order' (thesaurus). I am not certain of the 'sense of' bit.

'us state confusion interrupted by new' is the wordplay.
'us state' becomes 'Cal' (abbreviation for California).
'confusion' becomes 'mess' (I've seen this in other clues).
'interrupted by' indicates putting letters inside.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'mess' placed around 'n' is 'mness'.
'cal'+'mness'='CALMNESS'

Can you help me to learn more?

(Other definitions for calmness that I've seen before include "Composure, equanimity" , "Serenity" .)

I've seen this clue in The Independent.

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