Body chap found in vehicle (7)
I believe the answer is:
cadaver
'body' is the definition.
(cadaver is a kind of body)
'chap found in vehicle' is the wordplay.
'chap' becomes 'Dave' (man's name).
'found in' means one lot of letters goes inside another.
'vehicle' becomes 'car' (car is a kind of vehicle).
'dave' inserted within 'car' is 'CADAVER'.
(Other definitions for cadaver that I've seen before include "Human body dissected by medical students" , "Human corpse" , "Stiff" , "Dead body, corpse" , "A kind of corpse" .)