Related Clues:
- Viewer in a door
- Lock that's moved by key or knob, without a spring
- Place to take a peek
- Voyeur's vantage point
- Look here!
- Certain face-covering feature
- Mask's opening
- Half of those in 4 down presumably dig it? In my view, I'd look through it before opening up!
- Way to see through a front door
- Opening for viewing
- Halloween mask feature
- Mask element