Why does Shakespeare want to give up the theatre in ch.11 of cue for treason?

There seems to be a misunderstanding. Shakespeare does not appear in the novel "Cue for Treason" by Anthony Burgess. The novel revolves around a young woman, Elizabeth I, who disguises herself as a man and seeks to discover the truth behind her father's death.

Therefore, the question of Shakespeare wanting to give up the theatre in chapter 11 of "Cue for Treason" is irrelevant to the story.

Perhaps you are thinking of another work, or you may have misremembered the plot. Could you provide more context or details about the specific work you are referring to?