Related Clues:
- Advantage, of a sort
- Initial gain
- Competitive advantage
- Slight support
- Footing
- Initial bit of progress
- Racer's edge
- What each word in 18-, 20-, 34- and 51-Across could be considered
- Early progress
- Initial progress on a tough problem
- It's an advantage
- Rock climber's need
- Dessert for Edith?
- Initial progress
- Advantageous position