Needing rehabilitation, if Carol in a state (10)
I believe the answer is:
california
'state' is the definition.
(I know that California is a fictional state of the United States)
'needing rehabilitation if carol in a' is the wordplay.
'if carol in a' can be anagrammed to 'CALIFORNIA'.
But, I'm unsure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for california that I've seen before include "The Golden State" , "US state" .)