Sash opening? (6)
I believe the answer is:
window
(Other definitions for window that I've seen before include "Clear panel in envelope" , "Skylight" , "Transparent panel of glass" , "Opening in a wall" , "See 1 down" .)
I believe the answer is:
window
(Other definitions for window that I've seen before include "Clear panel in envelope" , "Skylight" , "Transparent panel of glass" , "Opening in a wall" , "See 1 down" .)