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3. Sound barrier breaker: Abbr

Alternative clues for the word sst

• Ultrafast plane, once
• Jet to JFK
• 2003 retiree, briefly
• Fleet flier
• Big and fast jet
• J.F.K. arrival of old
• Fast jet of old
• Controversial plane
• Retired flier, for short
• Plane with a machmeter: Abbr