| Answer | Crossword Clue |
|---|---|
| SST | Fast plane: Abbr. |
| SST | Former fast plane: Abbr. |
| SST | Old fast plane: Abbr. |
| SST | Retired fast plane: Abbr. |
| SST | Retired fast plane (abbr.) |
| RACER | Fast plane. |
| JET | Fast plane |
| SST | Fast plane |
| SST | Fast plane, briefly |
| RAMJET | Fast plane engine |
| SST | Very fast plane |
| CLIPPER | Fast ship or plane. |
| THUNDERBOLT | Fast USAAF fighter plane. |
| CHASER | Fast plane or ship. |
| SST | Fast plane, for short |
| SSTS | They're just plane fast? |
| SONIC | ... boom (noise from a fast plane) |
