Convertible orange car showing superiority (9)
I believe the answer is:
arrogance
'superiority' is the definition.
'convertible orange car' is the wordplay.
'convertible' is an anagram indicator.
'orange'+'car'='orangecar'
'orangecar' is an anagram of 'ARROGANCE'.
'showing' is the link.
(Other definitions for arrogance that I've seen before include "High-handed attitude" , "Wild self-importance" , "Hauteur" , "Conceitedness" , "Aggressive assertiveness" .)