Related Clues:

• Call from behind closed doors
• Reply at the door
• Unhelpful knock follower
• 'You know who I am'
• Exclamation upon removing a mask
• 'Just me,' formally
• Formal answer to 'Who's there?'
• Arrival's announcement
• 'Yours truly has arrived'
• Grammarian's reply to 'Who's there?'
• Potentially unhelpful answer to 'Who's there?'
• 'I'm here'
• Answer from behind a door
• 'You're looking at him'
• Identification assuming familiarity