A-lister's cool futuristic vehicle (8)
I believe the answer is:
starship
'futuristic vehicle' is the definition.
(vehicle for space travel)
'a-lister's cool' is the wordplay.
'a-lister's' becomes 'star's' (both can mean someone famous).
'cool' becomes 'hip' (hip can mean cool or fashionable).
'stars'+'hip'='STARSHIP'
(Other definitions for starship that I've seen before include "Space traveller" , "TV's USS Enterprise, for instance" , "Enterprise perhaps" , "Enterprise, possibly" , "one in SF movie?" .)