Small summerhouse (6)
I believe the answer is:
gazebo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small summerhouse</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 gazebo that I've seen before include "outhouse" , "Small garden building for shade and rest" , "Small summerhouse for shade" , "Garden sumer-house with wide view" , "Roofed structure in the garden" .)