New to Siena, might it be said? (3)

I believe the answer is:

raw

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'new to' is the definition.
(thesaurus)

I can't explain the rest of the clue.

(Other definitions for raw that I've seen before include "not manufactured" , "Unprocessed" , "Naked" , "Inexperienced in war (3)" , "Red and inflamed" .)

I've seen this clue in the Evening Standard.

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