Ukrainian seaport
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ukrainian seaport</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for odessa that I've seen before include "Port city on the Black Sea" , "Ukrainian location" , "Black Sea location" , "Do seas come into Ukrainian city?" , "Battleship Potemkin mutiny port" .)