13: One working with Linux, e.g.
14: Okefenokee Swamp inhabitant of fiction
15: Joseph, while in Egypt
21: Right-triangle reciprocal
27: Gets ready to be shot
36: Either of the racing Earnhardts
38: McCoy, to Captain Kirk
40: Pyramids, prisms, et al.
49: Block passage through
52: Pellet of precipitation
56: '___ Cowgirls Get the Blues'