Clue: Fast fliers of yore: Abbr.

Answer: SSTS

Length: 4

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Similar Clues:

• Former fast fliers: Abbr. (e.g. OWNS with 4 letters)
• Past fast fliers: Abbr. (SSTS with 4 letters)
• Fast former fliers: Abbr. (SSTS with 4 letters)
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