Related Clues:

• After 66-Across, Batcave feature
• "Let's Make a Deal" offering
• Opposite of exit
• Diary addition
• Datebook notation
• Cabinet feature
• Diary passage
• Webster's listing
• Passage in a log
• Word with "French" or "stage"
• Customs may precede it
• "In" place?
• Peephole's place
• It's implicit in knock-knock jokes
• Spot for a mail slot