Related Clues:

• Marathoner's concern
• Cons do it
• Life companion?
• It may run out
• Word with bottom (scuba diving period)
• Proverbial healer
• It can be high, full or free
• Watch reading
• Game-stopping call
• Play interrupter
• Use a stop watch
• Clock reading
• Life partner?
• Sprinter's concern
• Hawking's ''A Brief History of ___''