Artificial waterway (5)
I believe the answer is:
canal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">artificial 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 canal that I've seen before include "Duct" , "Passage" , "Man-made strip of water" , "Man-made waterway" , "navigate this?" .)