Medic with a Soviet limo climbing SW point (6)
I believe the answer is:
lizard
'sw point' is the definition.
(Lizard Point in the South West England)
'medic with a soviet limo climbing' is the wordplay.
'medic' becomes 'dr' (abbreviation for doctor).
'with' is a charade indicator (letters next to each other).
'soviet limo' becomes 'ZiL' (car made in the Soviet Union).
'climbing' says the letters should be written backwards (in a down clue, letters climb up).
'dr'+'a'+'zil'='drazil'
'drazil' back-to-front is 'LIZARD'.
(Other definitions for lizard that I've seen before include "England's southernmost Point" , "Reptile with four legs and long tail" , "leading to a windswept village" , "Reptile with two pairs of legs" , "A reptile; a Cornish Head" .)