Answer: SOLOACT

AnswerCrossword Clue
SOLOACTPerformance by one
SOLOACTOzzy Osbourne became one in 1979
SOLOACTPartnerless performance
SOLOACTOne-man band, e.g.
SOLOACTStand-up routine, usually
SOLOACTStand-up routine, typically
SOLOACTEx-band member, maybe
SOLOACTHelpless performance?
SOLOACTBeyonce became one in 2003
SOLOACTSomething David Copperfield has that Penn and Teller don't