Related Clues:

• Title of this puzzle
• Marital cheats
• Traitors
• Cheaters
• Untrustworthy chaps who've been jailed more than once?
• A couple of hunters, perhaps, who cheat?
• Primary school table about right for deceiving people?
• 'Our races are scrutinized down to the millisecond because we use ___'
• "Our races are scrutinized down to the millisecond because we use ___"
• Deceitful types watch grandfather, maybe
• Cheats a pair of clock-watchers
• Unreliable lovers watch clock perhaps
• A watch and a clock which can't be relied on?
• Perhaps watch grandfather supplying traitors
• Double-crossers (2 words)