Cure connected with year by the sea (6)
I believe the answer is:
remedy
'cure' is the definition.
(synonyms)
'connected with year by the sea' is the wordplay.
'connected with' becomes 're' (I am not sure about this - if you are sure you should believe this answer much more).
'year' becomes 'y'.
'by' is a charade indicator (letters next to each other).
'the sea' becomes 'med' (abbreviation of Mediterranean).
'y' after 'med' is 'medy'.
're'+'medy'='REMEDY'
Can you help me to learn more?
(Other definitions for remedy that I've seen before include "Curative medicine" , "Something that cures, disease or problem" , "Cure for disease or difficulty" , "Medication" , "solution" .)