The phrase "a significant section of the" is correct and usable in written English.
It can be used when referring to a large or important part of something, often in academic or analytical contexts.
Example: "A significant section of the report focuses on the environmental impact of the project."
Alternatives: "a substantial part of the" or "a major portion of the".
If they pursue their plan, they risk a significant section of the crowd jeering instead of cheering.
Sisi also has the support of a significant section of the population, who praise him for overthrowing Morsi in July.
A significant section of the working and lower middle class has already left Labour.
He poses two significant questions: he asks should Australians simply accept that a significant section of the community may be holding intolerant views?
They are two of the institutions that evoke the deepest-seated passions of a significant section of the Egyptian public, and you can't permanently shut them down".
"Mrs. Arroyo still has not convinced a significant section of the population that she won fair and square in the last election.
What if a significant section of that community supports honour killings or refuses to face the issue head-on?
The present study aims at understanding and predicting the contaminant transfer properties through a significant section of this formation, with a particular emphasis on diffusion.
A6 NATIONAL A11-15, 18 Section of Shuttle Wing With Tiles Is Discovered NASA found what investigators called a significant section of one of the space shuttle's wings, including tiles that have emerged as the prime suspects in the accident.
Our algorithm would segregate messages which are repropagated differently by a significant section of users, which has the potential to create a certain perceived level of social consensus.
There are certain to be fresh elections after Alexis Tsipras, the prime minister, saw a significant section of his party vote against the deal in parliament.
