Related Clues:

• ___ aerobics
• Rung
• Notch
• Get from ___ (progress)
• Stride
• Fender blemish
• Aerobics class order
• Stair unit
• Pace
• Flight unit
• Flight feature
• Aerobics action
• Escalate, with 'up'
• Aerobic bit
• Car-door woe