| Answer | Crossword Clue |
|---|---|
| HOLE | Hollow space |
| CAVITY | Hollow space |
| RECESS | Hollow space. |
| AIRSAC | Hollow space in birds |
| DYSON | ... sphere (theoretical hollow space construct) |
| LOOSELEGEND | The story of "Sleepy Hollow" set in outer space (or wherever else comes to mind)? |
