| Answer | Crossword Clue |
|---|---|
| SST | Former Mach 2 flier |
| SST | Former Mach 2 flier: Abbr. |
| SST | Mach 2 flier |
| SST | Mach-2 flier |
| SST | Mach-2 flier (abbr.) |
| SST | Mach 2 flier, once |
| SST | Mach 2 flier: Abbr. |
| SST | Mach 2 flier, for short |
| SSTS | Former Mach 2 craft |
| SSTS | Former Mach 2 flyers |
| SSTS | Former Mach 2 fliers, briefly |
| SSTS | Former Mach 2 fliers: Abbr. |
