20/3/19 A leg up
The idiom a leg up means (1) a boost or (2) a position of advantage.
When you get a leg up on your competition, you’re at least temporarily ahead of them in some significant way. The phrase comes from foot racing, where getting a leg up at the start of the race gives an edge.
While a leg up is usually treated as synonymous with advantage, some writers use it to mean a head start, which is in keeping with the idiom’s racing origins—for example:She added that the program gives the students a leg up on college and sparks a bright future.