New to Siena, might it be said? (3)
I believe the answer is:
raw
'new to' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for raw that I've seen before include "not manufactured" , "Unprocessed" , "Naked" , "Inexperienced in war (3)" , "Red and inflamed" .)