The First Academy’s Upper School Theatre Department will stage “Not a Clue,” a murder mystery board game parody, this weekend. The show opens at 7 p.m. Thursday, Sept. 12, at the TFA Black Box Theatre, 2667 Bruton Ave., Orlando. Performances also will take place at 7 p.m. Friday, Sept. 13, and Saturday, Sept. 14; and at 2 p.m. Sept. 14.