I am stuck completing the grid. I have two entries left, although I do have a strong candidate for one, but I can't parse it. One of these must be thematic unless I've made a mistake elsewhere, and I'm looking at 29, "Very famous theatre has no director." Is there actually a theatre involved, and if so, is it one I, a Yankee, should know? Also, I have 31 parsed, and presumably an expert of some sort, but given that there must be a misprint, not a "rocket expert." I have tried several possible alternatives, but nothing is clicking. Were I certain of the correction, I could possibly complete the instruction, and reverse engineer the rest, but alas.