
1) Brand name cookie 2) Breathing gas 3) Kosher food 4) Longtime oreo competitor 5) Oreo alternative 6) Oreo predecessor 7) Original Oreo competitor 8) Sunshine cookie 9) Vegan Oreo rival
Found on
https://www.crosswordclues.com/clue/hydrox

Hydrox is the brand name for a creme-filled chocolate sandwich cookie that debuted in 1908 and was manufactured by Sunshine (later Sunshine Biscuits). The similar Oreo cookie—introduced later, in 1912—was inspired by the Hydrox, yet Hydrox suffered from the impression of being the knockoff. Compared to Oreos, Hydrox cookies have a tangy, less-...
Found on
http://en.wikipedia.org/wiki/Hydrox
[breathing gas] Hydrox, a gas mixture of hydrogen and oxygen, was used as a breathing gas in very deep diving. It allows divers to descend several hundred metres. Precautions are necessary when using hydrox, since mixtures containing more than a few percent of both oxygen and hydrogen are explosive if ignited. Hydrogen is the lightest gas (...
Found on
http://en.wikipedia.org/wiki/Hydrox_(breathing_gas)
No exact match found.