Related Clues:

• PC's "Do it" key
• Embark (on)
• Encounter at the beginning and end is nothing less than an invitation
• Rap response
• "Come on in"
• ''Come on in''
• Come in to register
• Walk on stage
• Come in!
• Walk inside
• Take part in a contest
• Rogues leave tree surgeon to get in
• Tenant has no right to come in
• Put your name down to go in
• Often-pressed key