The phrase "a rising group of" is correct and usable in written English.
It can be used to describe an increasing number of individuals or entities that are gaining prominence or influence in a particular context.
Example: "There is a rising group of activists advocating for climate change awareness."
Alternatives: "an emerging group of" or "a growing number of".
In the U.S., a orthodox revolution led by a rising group of churchmen fiercely loyal to the agenda of John Paul II is underway.
A rising group of young officials with nationalist leanings in Mrs. Kirchner's government will have sway in molding Argentina's economic landscape after the YPF nationalization.
A rising group of young Indians conceives of class very differently: not as a fixed identity, but as a transient situation, and a situation that can change.
The subcommittee chairmen have been a frequent target of the Republican Study Committee, a rising group of junior House conservatives, for refusing to consider deep cuts in foreign aid and domestic social programs, and for the usual pork-barrel projects.
It has long divided the country, pitting a rising group of religiously observant Turks who govern the country against a once-powerful secular elite that has struggled to regain control over the Turkish state.
This week's back-and-forth between politicians from two different classes of society — a rising group of observant politicians and a secular elite that has long ruled the country — signals a larger battle to come as the two groups struggle for control of the Turkish state.
Then the opening up of India's economy in the 1990s created a hungry, rising group, especially in hundreds of India's smaller towns and villages.
In his Times article on the Tea Party right, Barstow profiled Pam Stout, a once apolitical Idaho retiree who cast her lot with a Tea Party group allied with Beck's 9/12 Project, the Birch Society and the Oath Keepers, a rising militia group of veterans and former law enforcement officers who champion disregarding laws they oppose.
Perhaps even more important, a rising new group of digitally focused colleges – though still highly uneven in quality – have the potential to make a difference.
Wang emerged from a rising new group of southern bureaucrats with a strong utilitarian bent, who challenged their more conservative, large-landholding colleagues from the north.
In their place was a rising new group of firms that did not sell goods and services to American households but instead sold advice to other companies.
