The phrase "a first leg of" is correct and usable in written English.
It can be used to describe the initial part of a journey, project, or process, often indicating that there will be subsequent parts or stages.
Example: "The first leg of our trip will take us through the mountains before we head to the coast."
Alternatives: "the initial phase of" or "the first part of".
Mr. Mendelson expects a drop of 15percentto20percentcent before the potential for a third leg of the bull market reappears.
We ended up buying them out in November 1993, seeing it as a second leg of our business.
She mentioned her Iowa plans, which could be part of a second leg of the bus tour.
Some economists have warned that the world economy is about to experience a third leg of post-crash instability after the initial banking collapse and eurozone crisis.
A third leg of the efforts against Iran's nuclear program, covert action by Israel and the United States, while known to exist, has also been difficult to verify.
A third leg of the tripod is a cable channel, the TV Guide Network, which presents original programming and the traditional listings guide.
"One of the key energy priorities for Sweden is to establish a third leg of energy production," said Anders Nyberg, political adviser in the Ministry of Enterprise, Energy and Communications.
In early 1984, when the industrials hovered slightly above 1,200, many money managers and investment firms were predicting a renewed surge in stock prices, expecting a "second leg" of the bull market that began in August 1982.
Even less is known about longer-term effects on babies exposed to painkillers, though in a second leg of their study, Dr. Jones and her fellow researchers plan to follow the 131 babies in the cohort until they turn 3.
A second leg of the Brussels investigation is examining whether Abedi had links to the so-called "man in the hat" caught on cameras at Brussels airport shortly before it was bombed, believed to be the Belgian Mohamed Abrini.
