Antarctic waters (4,3)
I believe the answer is:
ross sea
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">antarctic waters</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ross sea that I've seen before include "Antarctic inlet of the Pacific" , "South Pacific area" , "Large bay in Antarctica" , "body of water" , "Cold water" .)