Related Clues:

• Ready for mailing
• Shut up
• Part of S.W.A.K.
• Airtight
• Closed up
• Made airtight
• Tamper-resistant, perhaps
• Shut up tight
• Like some rulings
• -- out at (attacked)
• Part of SWAK
• Ready for mailing, as an envelope
• Closed, as an envelope
• Ready to mail
• Having the winner prearranged