Where, in Cornwall, to season timber (7)

I believe the answer is:

saltash

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'where in cornwall' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'season timber' is the wordplay.
'season' becomes 'salt' (salt can mean to season with salt).
'timber' becomes 'ash' (I've seen this before).
'salt'+'ash'='SALTASH'

'to' acts as a link.

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I've seen this clue in the Evening Standard.

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