Lasted out when seasoned (6)
I believe the answer is:
salted
'seasoned' is the definition.
(salting is a kind of seasoning)
'lasted out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'lasted' with letters rearranged gives 'SALTED'.
'when' acts as a link.
(Other definitions for salted that I've seen before include "Like some nuts" , "Seasoned, given piquancy; (of meat) preserved" , "Lasted, being preserved" , "cured" .)