Possible Clues:

• Some tux wearers
• Hip-hop DJs
• Motion City Soundtrack (Abbr.)
• Introducers of a show's acts, e.g.
• Roasts' hosts
• Short hosts
• 'Three ___ and One DJ' (Beastie Boys song)
• Lyte and Hammer, e.g.
• Intro makers
• Variety show overseers