Related Clues:

• Fasten, as a ski jacket
• Nothing (Sp.)
• Absolutely nothing
• Zip, to 4 Across
• Address ending, informally
• Zilch, south of the border
• Bupkis
• Diddly squat
• It's really nothing to a Spaniard
• Mail aid
• Nothing, in Nuevo Laredo
• Nothing, south of the border
• The White House's is 20500
• ___ Surf
• Zaragoza zilch