Louisiana waterway (5)
I believe the answer is:
bayou
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">louisiana waterway</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 bayou that I've seen before include "sluggish tributary appears" , "marshy water in New Orleans?" , "Swamp in Louisiana etc" , "US marshland" , "Marshy tributary of lake or river - a buoy (anag)" .)