Outbuilding (4)
There are a few possibilities for this:
lean-to
'outbuilding' is the definition.
(outbuilding in a garden)
This is all the clue.
(Other definitions for shed that I've seen before include "dropped" , "Garden feature" , "Barn" , "storage building" , "building away from home" .)
'outbuilding' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for barn that I've seen before include "Building for farm animals" , "Farm building for storing hay or grain" , "stable" , "Large farm outbuilding" , "Bran stored in farm shed" .)
'outbuilding' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lean-to that I've seen before include "It's roof slants against a wall" , "Outbuilding propped against another wall" , "Building put up against another" , "Structure whose roof has only one slope" , "Small building attached to larger one" .)