
1) Racing formula
Found on
https://www.crosswordclues.com/clue/superstox

Superstox is a type of single seat formula racing, similar to Sprint car racing developed in the 1960s in the United Kingdom. Racing is `contact` whereby drivers can use the front bumper to help dislodge any car in front. Like most other forms of short oval racing, the higher rated drivers normally start at the back of the grid for each race. It.....
Found on
http://en.wikipedia.org/wiki/Superstox
No exact match found.