Related Clues:

• It can get you in on the ground floor
• It may be a trap
• Way in or out
• Kind of prize
• Opportunity, metaphorically
• Morrison's backup
• Word with man or mat
• Elevator part
• Point of entry
• Site for a bell
• Opportunity, so to speak
• It's shown to some
• It could swing or revolve
• It may get into a jamb
• Slammer?