March 26 (UPI) --The U.S. Supreme Court on Wednesday upheld a Biden administration regulation on so-called ghost guns which allow people to obtain parts via online sellers to build a firearm.

The clue for 4-Across is "piece of the pie," while the clue for 1-Down is "piece of the pi," as in the famous 3.14 mathematical constant. Need some help with today's Mini Crossword? Read on.

Forbes contributors publish independent expert analyses and insights. Kris Holt is a writer who covers video games and word games.