Fast marching pace ... or

• Holiday rate, perhaps
• Fast marching pace ... or a hint to 16- and 39-Across and 10- and 24-Down
• Marching rate
• Premium wage
• 180 steps a minute
• Fast marching pace, and an alternate puzzle title
• Holiday pay rate, perhaps, and a hint to what can follow each word of each starred answer
• 12:00 12:00

Wikipedia Word definitions in Wikipedia
Doubletime is a documentary film about the sport of modern-day jump roping and Double Dutch . The film follows two disparate teams—one suburban white and one inner-city black—as they train to compete against each other for the very first time.