Related Clues:

• Begin, as school
• Walk in
• Oft-used computer key
• Get into
• Parking lot sign
• 'The door's open'
• Maze marking
• 'C'mon in!'
• It might be run at a bar
• 'Step right in!'
• Go in
• Coca-Cola Co. brand
• Key in
• Sign on a door
• Much-used computer key