Related Clues:

• Frequently used key
• Walk through the door
• Remark from the sexually frustrated, perhaps
• Walk right in
• Ladies
• They're from Mars, in a book title
• Work with data, in a way
• Grown boys
• Chess or checkers pieces
• Word said upon arrival
• Key key
• Adult males
• "Come in!"
• Knights, e.g.
• Type on a computer