Type of window (5)
'type of window' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for oriel that I've seen before include "Style of window" , "Large recess - type of window" , "polygonal recess" , "This window projects from upper storey" , "place to study at Oxford" .)
'type of window' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for casement that I've seen before include "Irish nationalist" , "Irish Roger" , "Window opening on a vertical hinge" , "Window for the patriot?" , "a man deemed to have betrayed England" .)