Revolutionary vehicle, favourite for special treatment (3,6)
I believe the answer is:
red carpet
'special treatment' is the definition.
(I've seen this before)
'revolutionary vehicle favourite' is the wordplay.
'revolutionary' becomes 'red' (red can informally mean communist).
'vehicle' becomes 'car' (car is a kind of vehicle).
'favourite' becomes 'pet' (synonyms).
'red'+'car'+'pet'='RED CARPET'
'for' acts as a link.
(Other definitions for red carpet that I've seen before include "It is rolled out for VIPs" , "Treatment for Royal" , "Welcoming walkway" , "celebrity treatment" , "sort of deferential treatment?" .)