Related Clues:

• MasterCard alternative
• ___ Field
• Traveler's need, perhaps
• Traveler's O.K.
• You can get a charge out of it
• Permission to go
• Big name in plastic
• Entry requirement, at times
• Popular credit card
• Traveler's need, maybe
• Payment option
• Permit
• Big prefix in banking
• Through
• Big name in plastic?