The sailor last wrecked (4)
I believe the answer is:
salt
'the sailor' is the definition.
(salt is a kind of sailor)
'last wrecked' is the wordplay.
'wrecked' indicates anagramming the letters.
'last' is an anagram of 'SALT'.
(Other definitions for salt that I've seen before include "White crystalline substance" , "Seasoning; old sailor" , "Sea dog" , "Seasoned sailor" , "Condiment - experienced sailor" .)