My husband takes wrong turning from Newquay? (7)

I believe the answer is:

cornish

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'newquay?' is the definition.
I can't tell whether this defines the answer.

'my husband takes wrong turning' is the wordplay.
'my' becomes 'cor' (both are expressions of surprise).
'husband' becomes 'h'.
'takes wrong' becomes 'sin' (I can't justify this - if you can you should believe this answer much more).
'turning' is a reversal indicator.
'h'+'sin'='hsin'
'hsin' reversed gives 'nish'.
'cor'+'nish'='CORNISH'

'from' is the link.

Can you help me to learn more?

(Other definitions for cornish that I've seen before include "A Celtic language" , "West Country" , "From a far SW county" , "Rich son (anag)" .)

I've seen this clue in The Sunday Times.

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