Related Clues:

• 'Faithful, always the same (8)'
• There's one pest relative to ten more
• One to one, e.g
• The facial index is one
• 4:1, e.g
• 9 to 5, say
• Betting odds, e.g
• 9 to 5, e.g
• Never varying
• The proportion of numbers the TD exchanges for the radio?
• 10:1, e.g
• There's often a colon in one
• It has a colon in the middle
• Tangent, e.g
• Always faithful?