Possible Clues:

• Emcee's device
• (Soon-to-be) former VP name (depending on when this is published)
• Hammer in crime fiction
• Karaoke night need
• You’ll see me holding one, karaoke just starting?
• Name that's 'M' in the NATO phonetic alphabet
• Improv gear
• Apt name for an audio technician?
• Stage prop with a different spelling nowadays
• Singer's device, informally