Related Clues:

• Data processing command
• Get in the game
• Urge on
• Long key
• Nearly half the world
• See 38-Down
• Onslaught
• Start, as school
• STEP IN
• Sign guys look for in a bar?
• Chess pieces, informally
• Put in, as into a log
• Big key
• Amendment XIX beneficiaries
• Oft-used key