2013 Puzzle 9: “Missing Theme Entry”

Here’s contest puzzle #9. Solve using the Crossword Compiler applet below, download a PDF, or use Across Lite.
The meta is the two grid entries that, when combined, complete this puzzle's theme.
Submit your answer to the meta using the form on the home page.

Missing Theme Entry by Pete Muller

Submit your solution to the meta using the form on the home page.