Largest ocean (7)
I believe the answer is:
pacific
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">largest ocean</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pacific that I've seen before include "Calm - sea" , "Promoting peace" , "Non-combatant" , "steam locomotive?" , "Calm (waters?)" .)