Not well maintained (6)
I believe the answer is:
shabby
'not well maintained' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for shabby that I've seen before include "Worn and run-down, like clothes" , "Of clothes, worn and threadbare (6)" , "has seen better days" , "in worn and dirty clothes" , "'Scruffy, tattered (6)'" .)