Type of shed (4-2)
I believe the answer is:
lean-to
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">type of shed</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 lean-to that I've seen before include "Shed abutting other building" , "Hut" , "Penthouse" , "Shed, outbuilding" , "Building put up against another" .)