| Answer | Crossword Clue |
|---|---|
| work | to increase in efficiency or skill |
| gain | increase in amount, magnitude, or degree a gain in efficiency |
| souping | to increase the power or efficiency of soup up an engine |
| soup | to improve the capacity for speed or increase the efficiency of (a motor or engine) by increasing the richness of the fuel mixture or the efficiency of the fuel, or by adjusting the engine |
| ankling | Flex the ankles while cycling in order to increase pedaling efficiency |
| ankled | Flex the ankles while cycling in order to increase pedaling efficiency |
