Answer: INDYCAR
The answer INDYCAR has 25 possible clues. See the results below.
Possible Clues:
- High-speed supercharged motor-racing vehicle
- Racing body with an annual "500" event
- __ Series: auto races
- 2005 17-race series
- Single-seater with turbocharged rear engine
- US motor, lead-free sort, lively when climbing
- Spirited driver's first with a lot of speed turning up in this?
- Big series name in auto racing
- "500" race-sanctioning group
- Race-sanctioning biggie