__ window (3)
(Other definitions for rear that I've seen before include "parent" , "Posterior" , "Rare at the back" , "what can be brought up, finally" , "The back part of something" .)
'window' is the definition.
(dormer window is a kind of window)
This is all the clue.
(Other definitions for dormer that I've seen before include "Bungalow with a vertical window in a sloping roof" , "Window under gable on sloping roof" , "Kind of window under gable" , "Type of window set in sloping roof" , "Window fitted vertically onto a sloping roof." .)
'window' is the definition.
(bay window is a kind of window)
This is the entire clue.
(Other definitions for bay that I've seen before include "laurel maybe" , "Laurel tree - bark" , "Botany, Galway or Tampa" , "Reddish-brown horse" , "Inlet; shrub" .)