Related Clues:
- Collar attachment for Spot
- Singular spectacle
- A single viewer?
- A single eyeglass
- Visual aid positioned in front of a single pupil
- Luggage necessity
- Security aid
- Attachment on some collars
- One helps to improve a pupil's performance
- 'Officially ...'
- Visual aid placed in front of single pupil
- Collar clip-on
- Attachment seen on a carousel
- Collar attachment with an owner's phone number, usually
- Baggage carousel aid