Vehicle account a second for Venezuelan capital (7)
I believe the answer is:
caracas
'venezuelan capital' is the definition.
(I've seen this before)
'vehicle account a second' is the wordplay.
'vehicle' becomes 'car' (car is a kind of vehicle).
'account' becomes 'ac' (abbreviation for account).
'second' becomes 's' (common abbreviation).
'car'+'ac'+'a'+'s'='CARACAS'
'for' is the link.
(Other definitions for caracas that I've seen before include "South American city" , "Venezuelan capital" , "South American capital" , "Capital of Venezuela" , "Capital city" .)