Gear in a new Renault (7)
I believe the answer is:
neutral
'gear' is the definition.
(I've seen this before)
'a new renault' is the wordplay.
'a new' indicates anagramming the letters.
'renault' anagrammed gives 'NEUTRAL'.
'in' is the link.
(Other definitions for neutral that I've seen before include "trying to keep out of the war" , "Renault altered" , "without any charge" , "nondescript colour" , "Inoffensive; beige colour" .)