Rapid rise transformed poor condition (9)
I believe the answer is:
disrepair
'poor condition' is the definition.
(I've seen this before)
'rapid rise transformed' is the wordplay.
'transformed' indicates an anagram.
'rapid'+'rise'='rapidrise'
'rapidrise' with letters rearranged gives 'DISREPAIR'.
(Other definitions for disrepair that I've seen before include "state of neglect" , "Poor condition" , "Ruin, dilapidation" , "Poor working order" , "poor state" .)