Pass is in Virginia (4)
I believe the answer is:
visa
'pass' is the definition.
(pass allowing international travel)
'is in virginia' is the wordplay.
'in' indicates putting letters inside.
'virginia' becomes 'va' (US state abbreviation).
'is' put within 'va' is 'VISA'.
(Other definitions for visa that I've seen before include "It allows the bearer to enter the country issuing it" , "ID" , "Travel stamp in passport" , "Passport stamp or well-known credit card" , "Travel document is required to enter Virginia" .)