Possible Clues:

• Trailblazing rappers Run-___
• Run's partner
• "It's Tricky" Run-___
• Hip-hop's Run-__
• "Raising Hell" Run-___
• Rap pioneers Run-___
• Run- — (rap trio)
• Run-___, first hip-hop group with a gold record
• Run-___ (hip-hop trio)
• Run-___ (hip-hop group)