Rides disorganised couple ruin (9)
I believe the answer is:
disrepair
'ruin' is the definition.
(I've seen this before)
'rides disorganised couple' is the wordplay.
'disorganised' indicates anagramming the letters.
'couple' becomes 'pair' (synonyms).
'rides' is an anagram of 'disre'.
'disre'+'pair'='DISREPAIR'
(Other definitions for disrepair that I've seen before include "state of neglect" , "rack and ruin" , "poor state" , "broken-down state" , "Poor condition" .)