Related Clues:

• Anonymous donor makes an entrance
• Alternative to knocker
• Entrance to room, house etc
• Entrance way
• Portal of opportunity, perhaps
• Option on 'Let's Make a Deal'
• It might be shown to you
• Armoire feature
• Transom site
• Departure point
• It may be sliding, swinging or revolving
• Hinged entrance
• It's open and shut
• Wreath-hanging site
• Knocking spot