Wrong dosage of antiquated salt
I believe the answer is:
sea dog
'antiquated salt' is the definition.
'sea dog' can be an answer for 'salt' ('sea dog' can be a synonym of 'salt'). I'm unsure of the 'antiquated' bit.
'wrong dosage' is the wordplay.
'wrong' is an anagram indicator.
'dosage' anagrammed gives 'SEA-DOG'.
'of' is the link.
Can you help me to learn more?
(Other definitions for sea dog that I've seen before include "'Old salt (3,3)'" , "Old tar" , "Experienced sailor (colloq.)" , "mythical creature" , "Experienced mariner" .)