Related Clues:

• Count a few sheep
• Tennis ball feature
• Brief respite
• Be unaware of imminent danger
• Refresher, of a sort
• A few z's
• One way to miss a class or meeting
• Doze off
• Some medical advice
• Doctor's prescription, sometimes
• Sit for a spell
• Quick refresher
• Dream state
• Take a few minutes
• Take a time-out