Birch-bark boat (5)
I believe the answer is:
canoe
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">birch</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(canoe birch is a kind of birch)</span><br/ ><br/ >'<span class="explanation-format__original">bark boat</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for canoe that I've seen before include "Boat that's paddled" , "Boat (that can be dug out!)" , "A dugout" , "Ocean (anag)" , "Primitive boat" .)