Related Clues:

• Powers a bicycle
• Economist's study
• Rinse and dry
• Pedals
• They can create distortion
• Bike pair
• Goes around in cycles
• Concert harp parts
• Bike propellers
• Sequence of songs
• Recurring sets of changes; groups of songs
• Cycles
• Rides for ages
• Cycles along quiet winding dales
• Periods; bikes