Related Clues:

• Vigour, potency
• Pairs finishing last are running with stamina
• A good attribute
• In - means in large numbers
• County backing keeps knight, oddly absent, in power
• Good attribute
• Concentration of power
• A good quality; might
• Proof requested by one who's exasperated?
• See heart of city in Country Life?
• See it in Country Life
• Might it have benefited Hercules?
• It's your go
• Beef supplied as a complement?
• Might be the alcohol content