Related Clues:

• "Who's there?" reply
• "I can help"
• 'Who's there?' answer
• 'Open the door, dude ...'
• "I'm yours to command"
• Announcement at the door
• 'Here I am!'
• Words after a knock
• "I'm here to help"
• "I'm available"
• "I'm at your disposal"
• See 10
• Submissive's demand
• "I'm home!" relative
• 'I can help'