Lose argument about Baltic (3)
I believe the answer is:
sea
'baltic' is the definition.
The definition and answer can be both natural objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'lose argument about' is the wordplay.
'about' says the answer is hidden in the clue (the clue goes around or about the answer).
'SEA' is hidden within 'lose argument'.
Can you help me to learn more?
(Other definitions for sea that I've seen before include "Eg, Aral, Ross, Irish" , "The deep" , "E.g Aral or Weddell" , "The Aegean, for example" , "Division of an ocean" .)