Related Clues:

• Undertaking to take possession by force
• Welcome command to do computing?
• Go in - set down
• Come in - penetrate
• Come in - register
• Come in - penetrate - record
• Record - stage direction - come in
• Join (for the first time)
• Cross the doorsill
• PC's "Do it" key
• Embark (on)
• Encounter at the beginning and end is nothing less than an invitation
• "Come on in"
• ''Come on in''
• Come in to register