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Alternative clues for the word sst

• Option for the jet set
• Pond-crossing option, once
• Boomer that retired in the early '00s?
• Jet to LAX, once
• High flier, once
• Concorde's letters
• Kind of plane: Abbr
• Transatlantic cruiser
• The Meat Puppets' record label, once
• Unrealized 60's Boeing project