Canal barge (6,4)
I believe the answer is:
narrow boat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">canal barge</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for narrow boat that I've seen before include "Traditional canal transport" , "Canal craft" , "specialised vessel" , "Vessel designed for canals" , "Canal barge" .)