| Answer | Crossword Clue |
|---|---|
| ECHO | Empty room sound |
| ECHO | Sound in an empty room |
| ECHO | Sound in a big, empty room |
| ECHO | Empty room phenomenon |
| NOONE | Empty room population? |
| NOONE | Occupant of an empty room |
| IMPATIENTLY | "The waiting room is empty" |
| ECHO | It might be heard in an empty room |
