Body of animal under vehicle, cold (7)
I believe the answer is:
carcass
'body' is the definition.
(carcass is a kind of body)
'animal under vehicle cold' is the wordplay.
'animal' becomes 'ass' (I've seen this before).
'under' says to put letters next to each other.
'vehicle' becomes 'car' (car is a kind of vehicle).
'cold' becomes 'c' (eg on taps).
'car'+'c'='carc'
'ass' put after 'carc' is 'CARCASS'.
'of' acts as a link.
(Other definitions for carcass that I've seen before include "Dead animal's body" , "Dead body of animal" , "Framework" .)