Related Clues:

• Take to the floor
• Pet Rock, famously
• Passing thing
• Emulate a Rockette
• Passing fancy
• School function
• School event
• Bob Fosse forte
• Twist, e.g.
• Passing rage
• Aerobic activity
• Twist or tango
• It's in for a while
• A kind of one begins 17- and 63-Across and 10- and 36-Down
• Fosse forte