Related Clues:

• "Abandon hope, all ye who ___ here"
• Punch in, as a PIN
• Rib or short loin
• See 44 Across
• Director's 'Stop!'
• Choose to compete in
• Pass through
• Take part in
• Write in
• It may start a scene
• Neighbor of a shift key
• Alternative to "return" on a keyboard
• "Door's open"
• Director's command
• Submit for judging