Related Clues:

• Hardest and strongest
• With the most nerve
• Most unfeeling
• Least arable, perhaps
• Superlatively strong
• Maximally unfriendly
• Hardest of the Sheffield teams?
• Notes it's becoming the hardest
• Most obdurate is sent to stir
• Most callous is sent to stir
• Most hard-hearted
• Most hardhearted or rocky
• Most hard and cold