High dosage for salt (3,3)
I believe the answer is:
sea dog
'salt' is the definition.
(synonyms)
'high dosage' is the wordplay.
'high' indicates an anagram (can mean drunk or on drugs and hence disordered).
'dosage' with letters rearranged gives 'SEA-DOG'.
'for' acts as a link.
(Other definitions for sea dog that I've seen before include "mythical creature" , "Ancient Mariner" , "Old or experienced sailor" , "Experienced mariner" , "Old tar" .)