Ocean (3)
'ocean' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for sea that I've seen before include "Ocean area" , "Large expanse of water" , "that's easily reached from Dover?" , "Vast expanse" , "Caspian, e.g." .)
'ocean' is the definition.
(Atlantic is an example)
This is all the clue.
(Other definitions for atlantic that I've seen before include "Second-largest ocean" , "What lies to the east of 10" , "Tilt a can at the ocean" , "Sea between Old and New Worlds" , "New Jersey resort" .)
'ocean' is the definition.
(Pacific Ocean is an example)
This is the entire clue.
(Other definitions for pacific that I've seen before include "Tranquil" , "See 18" , "Conciliatory - calm" , "Peaceable" , "mild" .)