Tumbledown (10)
I believe the answer is:
ramshackle
'tumbledown' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ramshackle that I've seen before include "Broken-down" , "In poor condition" , "Dilapidated" , "Badly-organised" , "In severe disrepair" .)