Related Clues:

• 'Come in!'
• Reply to a knock
• Response to a knock, perhaps
• 'Walk right in!'
• Answer to a knock
• Response to a knock
• Reply to a knocker
• 'Come on in'
• 'Come on in!'
• Response to a doorbell
• ''No need for your key''
• Shout after a knock
• "Come on in!"
• "Let yourself in!"
• Rap response