Ring from vehicle little Terry (6)
I believe the answer is:
cartel
'ring' is the definition.
(I've seen this before)
'vehicle little terry' is the wordplay.
'vehicle' becomes 'car' (car is a kind of vehicle).
'little terry' becomes 'tel' (nickname for Terry).
'car'+'tel'='CARTEL'
'from' is the link.
(Other definitions for cartel that I've seen before include "Organisation for political or market control" , "Market-fixing organisation" , "Manufacturers' group controlling market" , "Claret (anag)" , "Restrictive suppliers' association to fix market" .)