Related Clues:
- Checker, perhaps
- Driving force?
- Subway alternative
- It has a horn and charges
- Extremely, informally
- El alternative
- Hack's vehicle
- Its business is picking up
- It might make a career in the city
- Passenger vehicle
- DeVito sitcom
- Travel across a tarmac
- See 56-Across
- Rainy night quest, perhaps
- Opposite of 'unter'