| Answer | Crossword Clue |
|---|---|
| SST | Retired barrier breaker, for short |
| SST | Barrier breaker, for short |
| SST | Sound barrier breaker, for short |
| DOZER | Ground-breaker, for short. |
| SST | Retired jet, for short |
| SST | Retired flier, for short |
| SST | Retired boomer, for short |
| SSTS | Retired fliers, for short |
| SSTS | Retired jets, for short |
| QEII | Retired Cunard flagship, for short |
