Beverage that was invented in a Dairy Queen

ICEE

This frozen treat shares its name with a slang term for diamonds and is often found in convenience store freezers next to slushies.

This clue plays on the history of the ICEE, a frozen slushy drink that was actually invented in 1958 by Omar Knedlik, who owned a Dairy Queen franchise. The word "Dairy Queen" in the clue isn’t about the drink itself but hints at where the inventor worked when he created it. It’s a bit of a trick because ICEE isn’t a Dairy Queen product—just a fun nod to its origins.