Under water (9)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">under water</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 submerged that I've seen before include "overwhelmed" , "Under water" , "Completely covered by liquid" .)
(Another definition for submersed that I've seen is " Put under".)