Related Clues:

• Welsh fervour about to be conveyed by aptitude for moving part
• Heavy rotating part of engine
• Heavy revolving mechanism that increases a machine's momentum
• Part of machinery that revolves to store kinetic energy
• Regulator used to smooth the running of a reciprocating engine
• One's regular turn to ensure machinery conserves power?
• Rotor storing power
• Device storing angular momentum
• Means of storing power
• Power store
• Rotating power store
• Cunning we will, so to speak, put in device to help machine run smoothly
• Top entomologist?
• Machine regulator's smart turn
• Turn overlooked by sly governor