Napa product (4)
I believe the answer is:
wine
'napa product' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for wine that I've seen before include "Eg, Bordeaux" , "Alcohol" , "Beaujolais, for example" , "Something made with 16?" , "Frascati, perhaps" .)