Ultimately wanting 22 nudists at casting for play (5,10)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

An anagram (‘casting’) of UNICOR n (22ac) missing last letter or ‘ultimately wanting’ and NUDISTS AT. When we solved this we actually had a smile. We once saw the dress rehearsal at the Globe. When our son asked what we had missed by leaving early to catch our train home we said, 3 killings and one live burial. We cannot now remember whether we were there when the pies were eaten! We did return and saw the whole play.