Possible Clues:

• Chronotherapy aids it
• WETS
• Sore labour's bath, to Shakespeare
• Opposite of "stay awake"
• Removes clothing, retiring for this
• Prime Minister rises following second snooze
• "Talking in Your ___" (The Romantics)
• Be off for the rest of the night
• It may come after setting an alarm
• Berth rite