Mistakes rare sporty car with aerodynamic front (6)
I believe the answer is:
errata
'mistakes' is the definition.
(erratum is a kind of mistake)
'rare sporty car with aerodynamic front' is the wordplay.
'sporty' is an anagram indicator.
'car' becomes 't'.
'with' is a charade indicator (letters next to each other).
'front' says to take the initial letters.
The initial letter of 'aerodynamic' is 'a'.
'rare' with letters rearranged gives 'erra'.
'erra'+'t'+'a'='ERRATA'
(Other definitions for errata that I've seen before include "List of text corrections to be made in a publication" , "Mistakes in printed material" , "Boobs in a book" , "Noted mistakes" , "List of printed mistakes" .)