Watercourse (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">watercourse</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that river is a type of watercourse)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for river that I've seen before include "Tributary" , "Waterway" , "eg Aire" , "x or y, so to speak" , "Eg, Severn" .)
(Other definitions for canal that I've seen before include "eg Grand Union" , "navigate this?" , "Duct" , "Passage" , "Man-made watercourse" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">watercourse</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that watercourse can be written as stream)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for stream that I've seen before include "One small river" , "Running liquid" , "Brook, burn" , "Master of a tributary" , "Transmit music or video online" .)