Cable trio about carriage (9)
I believe the answer is:
cabriolet
'carriage' is the definition.
(I know that cabriolet is a type of carriage)
'cable trio about' is the wordplay.
'about' indicates anagramming the letters.
'cable'+'trio'='cabletrio'
'cabletrio' is an anagram of 'CABRIOLET'.
(Other definitions for cabriolet that I've seen before include "Car with a folding roof" , "Light two-wheeled carriage" , "Car with a folding top -- trace boil (anag)" , "Soft-top car" , "Horse-drawn carriage with two seats and a folding hood" .)