Clue: Fast fliers, once

Answer: SSTS

Length: 4

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Similar Clues:

• Former fast fliers (SSTS with 4 letters)
• Fast fliers, briefly (SSTS with 4 letters)
• Fast fliers of yore: Abbr. (SSTS with 4 letters)
• Grounded fleet of fast fliers (SSTS with 4 letters)
• Fast fliers of the past: Abbr. (SSTS with 4 letters)
• Super-fast fliers, briefly (SSTS with 4 letters)
• Past fast fliers: Abbr. (SSTS with 4 letters)
• Grounded fast fliers (SSTS with 4 letters)
• Fast former fliers: Abbr. (SSTS with 4 letters)
• Fast fliers (e.g. JETS with 4 letters)