Threshold (4)
'threshold' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sill that I've seen before include "Slab at foot of window" , "Window edge" , "Underwater rock ledge" , "Shelf at the foot of a window" , "Horizontal timber forming the bottom of a framework" .)
'threshold' is the definition.
(I know that threshold can be written as verge)
This is the entire clue.
(Other definitions for verge that I've seen before include "Grass border along road" , "Grass edge to road" , "Border - edge" , "Side of road" , "Grassy road edge" .)