Seasoned; preserved (6)
I believe the answer is:
salted
I believe this is a double definition.
'seasoned' is the first definition.
(salting is a kind of seasoning)
'preserved' is the second definition.
(salting is a kind of preserving)
(Other definitions for salted that I've seen before include "cured" , "Lasted, being preserved" , "Seasoned, given piquancy; (of meat) preserved" , "Like some nuts" .)