Related Clues:

• Just opened
• Feel regret for
• See 34 Across
• Express sorrow
• React to a loss
• Partly open
• Obviously unlocked
• Deeply regret
• Q: 'When is a door not a door?' A: 'When it's ___'
• Closed to some extent
• Product of hindsight, sometimes
• Express grief
• Allowing a peek, in a way
• Mourning song
• Dirge