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Alternative clues for the word sst

• Stratosphere streaker
• Air France fleet component, once
• Ultrafast jet, for short
• Droop-nosed ex-flier
• Mach 1 flier
• Speedy airplane
• Concorde jet
• Onetime Heathrow lander
• Tupolev Tu-144 was the first one
• Former boomer, briefly