Louisiana city (10)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">louisiana city</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for new orleans that I've seen before include "US city" , "City of Louisiana" , "Devastated city" , "port city in the south" .)