Related Clues:

• Critic or hitchhiker's need
• 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
• It's out on a limb
• One of a rhino's 12