The fourteenth amendment clause is about

due process of law

Explanation:

All persons born or naturalized in the United States and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.

The 14th Amendment contained three major provisions: The Citizenship Clause granted citizenship to All persons born or naturalized in the United States. The Due Process Clause declared that states may not deny any person "life, liberty or property, without due process of law."