| Answer | Crossword Clue |
|---|---|
| STAGE | Area with an imaginary fourth wall |
| dummy | An imaginary fourth player in whist |
| dummies | An imaginary fourth player in whist |
| lunette | (in the plane of a wall) an area enframed by an arch or vault |
| embankments | A wall or bank of earth or stone built to prevent a river flooding an area |
| embankment | A wall or bank of earth or stone built to prevent a river flooding an area |
| clypei | the area of the facial wall of an insect's head between the labrum and the frons, usually separated from the latter by a groove |
| clypeus | the area of the facial wall of an insect's head between the labrum and the frons, usually separated from the latter by a groove |
