50A: [Notable quintet (Row B)] is SENSES. 142A: [Notable quintet (Row E)] is SPICE GIRLS. 81A: [Parts of the 5×5 grid whose corresponding 93 Across will lead you to the meta answer] is COLUMNS. We know that we need to fill the 5×5 grid with single letters, specifically the first letters of 25 different answers. It’s amazing just how long it took me to nail down a 5×5 grid that satisfied both conditions.

Source: Washington Post December 27, 2020 14:01 UTC