’Tis the season to be jolly, but Cora Felton, shanghaied into “The Twelve Days of Christmas” as a most reluctant maid-a-milking, has every right to feel like a grinch. When someone steals the partridge from the pear tree and replaces it with a cryptic puzzle she has no hope of solving, it’s almost more than the Puzzle Lady can bear. But then smug crossword creator Harvey Beerbaum solves the acrostic, and it turns out to be a poem promising the death of an actress. This is more like it! Could the threat be aimed at Cora and her thespian debut? Or at Sherry, one of the ladies-dancing? Or at Sherry’s nemesis, the pageant’s predatory lead, Becky Baldwin?