A travel pass is required in Virginia (4)
I believe the answer is:
visa
'a travel pass' is the definition.
(I've seen this before)
'is required in virginia' is the wordplay.
'required in' indicates putting letters inside.
'virginia' becomes 'va' (US state abbreviation).
'is' inserted into 'va' is 'VISA'.
(Other definitions for visa that I've seen before include "ID" , "Mark on passport" , "Authorisation to enter a country" , "Endorsement made in a passport" , "travel authority" .)