Related Clues:

• Boy's ambition to go with Virgin ere end appears?
• Donkey, for one, bearing trap in Tyneside
• 13 across with E number good to be eaten
• Motor concluding greening process
• Machine supplying power
• Turbine, e.g
• Gene in convertible for a start?
• Road runner?
• Machine with moving parts
• V-8, e.g
• It may purr or roar
• Car part, say, overlapping 9
• It's often described by horses
• Machine doing work
• Motor needing to be repaired after middle bit's fallen out