Related Clues:

• Fortification
• Window over a door
• Crescent moon
• Semicircular symbol
• First quarter appearance
• Half-circle window
• Crescent-shaped opening
• Crescent-shaped window
• Half-circle window over a door
• Windows above a door
• Window above a door
• The revolver carried little weight over the door
• Sounds as if one might get e'er a bit of illumination from over the door
• 'No heavy ventilation, it seems, over the door (8)'
• Catcher where there's a rift that's crescent-shaped