Downright discontented setter's punching worker's lights out (7)

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

D [ownrigh] T (dis-contented = contents removed) + I’M (setter’s = the writer of this crossword is), inserted into (punching) BEE (possibly a worker bee). Lights out = the time when people are supposed to be in bed with the lights off.