Endure, using salt (4)
I believe the answer is:
last
'endure' is the definition.
(I know that endure can be written as last)
'using salt' is the wordplay.
'using' is an anagram indicator (the letters used in a different way).
'salt' anagrammed gives 'LAST'.
(Other definitions for last that I've seen before include "nowhere near winning Miss World?" , "Cargo to stay fresh" , "It helps cobbler" , "Most unlikely" , "Cobbler's model shape" .)