Seasoned as sulphur gets dealt out (6)
I believe the answer is:
salted
'seasoned' is the definition.
(salting is a kind of seasoning)
'sulphur gets dealt out' is the wordplay.
'sulphur' becomes 's' (synonyms).
'gets' means one lot of letters go next to another.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'dealt' anagrammed gives 'alted'.
's'+'alted'='SALTED'
'as' is the link.
(Other definitions for salted that I've seen before include "Lasted, being preserved" , "Like some nuts" , "cured" , "Seasoned, given piquancy; (of meat) preserved" .)