Related Clues:

• Dentist's directive
• Dentist's request
• Request from the dentist
• More broad
• More immense
• More vast
• More extensive
• Farther-reaching
• Dentist's instruction, sometimes
• Dentist's request, perhaps
• Safer, as a road
• More massive
• Farther astray
• More enormous
• More spacious, in a way