Related Clues:

• Letting in a draft, say
• Open just a bit
• Feel regret about
• Clearly not latched
• Feel contrition
• Imperfectly closed, as a door
• Sit shiva, say
• Admitting peek traffic?
• Apology element
• Half cracked?
• Perfect for peeking through
• When it's __: answer to an old riddle about a door
• Kick oneself over
• Allowing a draft, perhaps
• Greatly regret