Brine (4,5)
'brine' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for salt water that I've seen before include "part of recipe for boiled potatoes?" , "Walter sat in brine" , "Of or living in the sea, related to saline content" , "Tears" , "briny" .)
(Other definitions for saline that I've seen before include "Salty like sea water" , "Like contents of cellar" , "Intravenous feeding" , "Like seawater" , "like the Mediterranean?" .)
(Another definition for saltwater that I've seen is " sea".)
'brine' is the definition.
(I know that brine can be written as seawater)
This is the entire clue.
(Other definitions for seawater that I've seen before include "Brine" , "What breaches dyke, perhaps" , "Drink" .)