Related Clues:

• It enables us to see article near top of stairs
• Sealant placed round clear opening in dome
• Cement mix covering openwork in fortification
• Instrument holding curtain material in aperture
• Instrument protects catch over the door for light
• Cement sealing clear opening in dome
• Arched opening in a vault
• High-level illumination for the benefit of the supporter?
• Window over a door or over another window
• Steps outside an upper window
• Thin flag (anag.)
• Crescent-shaped space
• Ornament having a crescent shape
• Ordered toilet mesh that lets in light
• Aperture in instrument plugged with open fabric