A classic Russian luxury vehicle skirts Italian road (6)
I believe the answer is:
caviar
'a classic russian luxury' is the definition.
(delicacy often produced in Russia)
'vehicle skirts italian road' is the wordplay.
'vehicle' becomes 'car' (car is a kind of vehicle).
'skirts' means one lot of letters goes inside another.
'italian road' becomes 'via' ('road' in Italian).
'car' going around 'via' is 'CAVIAR'.
(Other definitions for caviar that I've seen before include "Sturgeon delicacy" , "Expensive roe" , "Sturgeon eggs" , "Fish roe" , "dear thing" .)