Possible Clues:

• Cold times
• Chilly seasons
• Spends December through March (in)
• Mearth portrayer in "Mork & Mindy"
• When many shovels may be seen
• Bundle-up times
• Chilly times
• Shelley --, US actress (1920-2006)
• They're not hot
• Don't lose the rest in confusion when they're cold