The phrase "a serious force in" is correct and usable in written English.
It can be used to describe someone or something that has significant influence or impact in a particular area or field.
Example: "The organization has become a serious force in environmental advocacy, pushing for significant policy changes."
Alternatives: "a major player in" or "a significant influence in".
The Lib Dems are a serious force in government.
For the first time in a generation, students are a serious force in British politics.
She is also seen as a serious force in the party.
That career was very difficult as women were just emerging as a serious force in an environment controlled by men.
George H. Gallup did not invent public opinion polling, but, more than anyone else, he made it a serious force in American society and in the world.
Expelled from the ANC in 1997 for allegedly having spied for previous white rulers, he joined the UDM and, through a mixture of intimidation and fine speeches, made the new party a serious force in the province.
These collected reviews, originally published in British and (later) American newspapers and magazines in the 1950s, present the critic both as a serious force for change (in Tynan's legendary championing of John Osborne's "Look Back in Anger") and a delightful poisoned wordsmith.
One reason why BP gobbled up Amoco was to expand its small asset base in gas into a serious force.
There is, furthermore, serious force in the argument that an American war against Iraq might turn more Muslims against America.
Jail experts said the Sheriff's Department has made significant progress in reducing serious force in the jails but that Grijalva's case raises ongoing concerns about whether inmates feel safe enough to come forward with complaints about brutality or other jailer misconduct.
Labour and the Liberal Democrats have run the executive since 1999, while the Tories have ceased to exist as a serious political force in Scotland.
