Possible Clues:

• Something worn while playing the Blues, say
• Gear for 49-Across
• Glide across a frozen pond, say
• Glide in a rink
• Item of equipment for the NCAA's Frozen Four
• Enjoy the lake in winter, perhaps
• Slipper on foot?
• Winter sports shoe
• Piece of hockey footwear
• Take in the winter lake and fish behind on the rocks