The phrase "a defining issue and" is correct and usable in written English.
It can be used when discussing a significant topic or concern that plays a crucial role in a particular context or situation.
Example: "Climate change is a defining issue and requires immediate action from governments worldwide."
Alternatives: "a critical matter and" or "a pivotal concern and".
That's why a minimum wage hike has been and continues to be a defining issue for civil and human rights advocates.
And yet, it's a defining issue for him, and one that was built upon years of anti-LGBT attacks by Pence as a radio host and commentator and as a member of Congress, where he even proposed cutting funding for AIDS and diverting the money to "ex-gay" therapy programs.
The candidates are running on health care costs — a defining issue for Democrats this year — and issues like gun control and the environment, on which the national Republican Party has shifted right even as the district has migrated left.
It has become a defining issue for U.S. environmentalists, and was one of the most politically charged and significant issues that Clinton faced during her time at State and yet her memoir, "Hard Choices," contains not a single mention of Keystone.
It has become a defining issue for U.S. environmentalists, and was one of the most politically charged and significant issues that Clinton faced during her time at State — and yet her memoir, "Hard Choices," contains not a single mention of Keystone.
President Obama and Secretary of State Hillary Clinton were making the empowerment of women a defining issue in U.S. foreign policy, and the health and welfare of girls and women was seen as central to the fortunes of the developing world.
It is a defining issue for many Democrats, and Bill Bradley pushed it to center stage in his unsuccessful primary challenge to Vice President Al Gore.
The fight to eradicate the scourge of forced and child labour, sometimes referred to as modern-day slavery, has re-emerged as a defining issue in this century and cannot be left to any one stakeholder alone.
The ACCC chairman, Rod Sims, believes the survival of quality journalism in the face of digital giants such as Facebook is a defining issue of our age and says quality investigative journalism is highly valued in Australian society.
"Climate change is a defining issue of our time and there is no time to lose.
