Related Clues:
- Common cause of snoring
- Breathing problem for a sleeper
- Out all night? I'd like to be!
- Problem for sleepers
- Sleep clinic diagnosis
- Sleeper's ailment
- Sleep condition treated with a CPAP machine
- Common sleep disorder
- Sleep affliction
- Sleep woe
- Reason for a sleep mask, perhaps
- Potential REM interrupter
- Sleeper’s ailment
- Condition that might require a CPAP machine
- A poor kipper