Related Clues:

• It might be taken mid-afternoon
• Sleep at one's desk, say
• Catch 40 winks
• Brief slumber
• Go out during the day?
• A short day-sleep
• Short raised fibres on cloth on snooker table
• A daytime doze
• Racing tip that professes to be a certainty
• A brief sleep, forty winks
• A brief snooze
• A short sleep
• A short sleep or snooze
• Raised fibres on surface of cloth or leather
• A brief informal sleep