Related Clues:

• It secures a nut
• Suddenly run away
• Unit of cloth or lightning
• Surprise "from the blue"
• Lightning --
• It may be put in a washer
• Aptly named sprinter Usain
• _____ out of the blue
• In the works, this tool is a headache
• In the works, it's disruptive
• Flee with door-locking device
• A . . . . from the blue is a complete surprise
• In the works, this tool is an obstacle
• From the blue, it's a big surprise
• From the blue, it's a great surprise