Diana confused about ... about some French settler in Canada (7)

I believe the answer is:

acadian

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

'some french settler in canada' is the definition.
I can't tell whether this definition defines the answer.

'diana confused about about' is the wordplay.
'confused' indicates anagramming the letters.
'about' indicates putting letters inside.
'about' becomes 'ca' (abbreviation for 'circa').
'diana' anagrammed gives 'adian'.
'adian' enclosing 'ca' is 'ACADIAN'.

Can you help me to learn more?

(Other definitions for acadian that I've seen before include "A Canadian" , "French-Canadian, Cajun" .)

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

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