Related Clues:

• Head opposite
• Tapper, at times
• Digit that may be big
• Water-temperature tester
• See 6 Across
• Water tester?
• Single digit
• Corn grower
• Foot's end
• It's usually first into the tub
• Word with hold or nail
• The third O of OOO
• Bathtime tester
• The third of three X's
• Gout target, often