Clue: SST, once

Answer: FLIER

Length: 5

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Similar Clues:

• What SSTs crossed: Abbr. (ATL with 3 letters)
• SSTs used to cross it (ATL with 3 letters)
• SSTs roared over it (ATL with 3 letters)
• SSTs flew over it (ATL with 3 letters)
• Sounds SSTs made (BOOMS with 5 letters)
• Speed exceeded by SSTs (MACHI with 5 letters)

Nothing more is found...