Related Clues:
- Disconnection
- Unfilled space
- Expire, as a subscription
- Dental problem calling for braces
- Senior moment, say
- Inner space
- One may precede a recall
- Missing memory
- Short period of forgetfulness
- Cumberland, for one
- Small error
- Nixon tape mystery
- Chain with threads?
- Feature of Alfred E. Neuman's smile
- David Letterman feature