Solution to Evan Birnholz’s Feb. 21 Post Magazine crossword, “Board Members”

The revealer at 66A that ties it together is another computer key: [Backspace neighbor for many PC users … or, when interpreted as a command, a hint to this puzzle’s theme] which is INSERT KEY.

This theme came about from one of the tried-and-true ways that I come up with themes — struggling for hours or days with writer’s block and then randomly thinking of something that seems like it could work. The “randomly thinking of something” part came when I looked down at my keyboard and just thought, ‘Okay, let’s do that.’ I only have one slight regret that I didn’t think of a way to use the funny-looking key PG UP (short for “page up”). Off the top of my head, maybe by adding it to harpy to make HARP GUPPY?

Source: WP