| Answer | Crossword Clue |
|---|---|
| MSDOS | Key to Microsoft's early success |
| SAUCE | Secret ... (metaphoric key to success) |
| clavichord | A small, rectangular keyboard instrument producing a soft sound by means of metal blades attached to the ends of key levers that gently press the strings, popular from the early 15th to early 19th centuries |
| clavichords | A small, rectangular keyboard instrument producing a soft sound by means of metal blades attached to the ends of key levers that gently press the strings, popular from the early 15th to early 19th centuries |
