Related Clues:

• OK, in a way
• Visa feature
• Penny Black was the first one
• Post office purchase
• Cachet
• Some vegans won't lick it
• Arctic swimmer
• It leaves an impression
• It jumps through hoops
• Warranty feature
• Abolish (with ''out'')
• Collectible that displays its original value
• Ink spot
• Fasten shut
• Close tight