Possible Clues:

• 'Spell of low temperature weather (4,4)'
• Sudden chilly weather brings diseases — sleep!
• First hint of cloud and Poland's suffering a chilly spell
• Iced gingerbread biscuit needed for chilly spell
• Sudden chill: mild illnesses need sleep
• Spell of chilly weather
• Two officers taking short time out as forecasted by those who know which way the wind is blowing
• Winter ailments needing sleep in chilly time
• Not hotshot for a drop in temperature
• Cop outside lands in trouble: time to go inside