| Answer | Crossword Clue |
|---|---|
| MACHI | A certain speed of sound. |
| SONIC | Of a speed equal to the speed of sound. |
| MACH | Physicist for whom a speed-of-sound ratio is named |
| CAINE | A certain high-speed minesweeper. |
| SNORE | Make a certain sound |
| TONED | Having a certain sound. |
| ACHOO | Sound accompanying a certain spasm |
| PLOPS | Falls with a certain sound. |
| RIMSHOT | Certain sound from a snare drum |
