Related Clues:
- Slightly open, as a door
- Cracked slightly
- Allowing a draft
- Enabling eavesdropping, perhaps
- Not closed
- Not closed all the way
- Like a door, when it's not a door, in a riddle
- On the down-low
- Close to shut
- Allowing a peek
- Behind-the-scenes
- Barely admitting air
- Cautiously shrewd
- Nearly shut
- Causing a draft