Roughly-built hut (5)
I believe the answer is:
shack
'roughly-built hut' is the definition.
(a shack is a basic dwelling)
This is the entire clue.
(Other definitions for shack that I've seen before include "Hovel" , "building made of wood?" , "Crude dwelling" , "Rough hut or cabin" , "Crudely built hut" .)