Evan Birnholz's guide to the March 13 Post Magazine crossword, "Connection Problem"

Happy not-quite St. Patrick's Day, everyone! Quick announcement before diving into "Connection Problem": My friends over at the Indie 500 Crossword Tournament have released a metapuzzle that explains the theme of the second annual tournament, which will take place on June 4 in Washington, D.C. If you send in your answer to that metapuzzle before 3 p.m. ET on Friday, March 18, you'll have a chance to win free entry to the tournament. Though I'm not involved in it this year, I was a co-founder of ...