Alienated teens drag racing (9)
I believe the answer is:
estranged
'alienated' is the definition.
(synonyms)
'teens drag racing' is the wordplay.
'racing' indicates an anagram (to race around can mean to move).
'teens'+'drag'='teensdrag'
'teensdrag' is an anagram of 'ESTRANGED'.
(Other definitions for estranged that I've seen before include "Sad regent (anag) - disaffected" , "Cut off" , "Split" , "Alienated, disaffected" , "Having become unfriendly or alienated" .)