Stripped cars with fully developed motor component (8)
I believe the answer is:
armature
'motor component' is the definition.
'stripped cars with fully developed' is the wordplay.
'stripped' indicates the central letters.
'with' is a charade indicator (letters next to each other).
'fully developed' becomes 'mature' (I've seen this before).
The centre of 'cars' is 'ar'.
'ar'+'mature'='ARMATURE'
(Other definitions for armature that I've seen before include "motor part" , "Rotating dynamo coil - a rum tear (anag)" , "Part of dynamo" , "keeper" , "equipment for defence" .)