Rubbish in a bad state (3)
I believe the answer is:
rot
This clue is a triple definition!
'rubbish' is the first definition.
(both can mean nonsense)
'in' is a link.
'a bad' is the second definition.
(I've seen this before)
'state' is the third definition.
(rot is a kind of state)
(Other definitions for rot that I've seen before include "Garbage" , "Break down, waste away" , "SECOND PART OF 25" , "Decay in grotesque way" , "Deteriorate" .)