Sea dog treated with right amount of medicine (6)
I believe the answer is:
dosage
'amount of medicine' is the definition.
(I've seen this before)
'sea dog treated' is the wordplay.
'treated' is an anagram indicator.
'sea'+'dog'='seadog'
'seadog' anagrammed gives 'DOSAGE'.
'with right' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for dosage that I've seen before include "Measured amount of medicine to be taken" , "measure" , "Medicine administered" , "The giving of medication in prescribed amount" , "Giving of medicine in prescribed amount" .)