Possible Clues:

• Sterilize
• Tenure
• Puppy's shrill cries rising? Have it sterilised!
• Do what Bob Barker reminded us to do to house animals
• Do a vet's work
• Alter, in a way
• Fix like a vet
• Heed Bob Barker's advice at the end of 'The Price is Right'
• Fix the cat, e.g.
• Fix for good?