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3. Sound barrier breaker: Abbr.

Alternative clues for the word sst

• One-time Air France plane
• Grounded plane: Abbr
• Noisy streaker
• Former Air France jet, briefly
• Overkill L.A. label
• Former fast flier into JFK
• TU 144, for one
• Out-of-service plane
• Concorde, e.g., briefly
• Former fast flier, for short