Related Clues:

• Not closed
• Not closed all the way
• Feel sorrow
• Cry of sorrow
• Like a door, when it's not a door, in a riddle
• Regret deeply
• Close to shut
• Allowing a peek
• Barely admitting air
• Be contrite about
• Feeling of rue
• 'Alas, poor Yorick!,' e.g.
• Nearly shut
• Causing a draft
• Open enough to peep through