Driver has brawl in vehicle (8)
I believe the answer is:
cameleer
'driver' is the definition.
(thesaurus)
'brawl in vehicle' is the wordplay.
'brawl' becomes 'melee' (I've seen this before).
'in' is an insertion indicator.
'vehicle' becomes 'car' (car is a kind of vehicle).
'melee' inserted within 'car' is 'CAMELEER'.
'has' is the link.
(Other definitions for cameleer that I've seen before include "One driving across the Sahara" , "Rider" , "Desert traveller" , "one in a caravan maybe" , "Driver" .)