Possible Clues:

• Toe and heel clicking performer
• Entertainer illicitly intercepted reply on telephone
• One caught in blast, air exploding?
• Fred Astaire, at times
• One taking steps to make himself heard
• Performer who can tread about quietly? Not this one!
• Ask Santa's helper for a few bob? That's a job for someone staying on feet and stepping on toes!
• He trips and hits the floor noisily
• Performer can depart flamboyantly
• One hoofs around -- and carpet may be ruined