Possible Clues:

• Producer of Snoop's 'Doggy Dogg World'
• '__ Day': 1993 rap hit
• 'The Chronic' rapper Dr. ___
• Hip-hop 'Dr.'
• "__ Day": 1993 rap hit
• Dr. who co-founded a record label
• 'Forgot About ___' (Grammy-winning rap song)
• Rapper who founded Aftermath Entertainment
• Onetime cohort of Eazy-E
• Rap's Dr