Discard outhouse (4)
I believe the answer is:
shed
This clue is a double definition.
'discard' is the first definition.
(I've seen this before)
'outhouse' is the second definition.
(a shed is an outside building)
(Other definitions for shed that I've seen before include "lost" , "Jettison" , "Take off in hut?" , "warehouse" , "something at the bottom of the garden?" .)