The Only Use

Ku Klux Klan
in
A Raisin in the Sun
(Auto-generated)

(At her door) Mama, if there are two things we, as a people, have got to overcome, one is the Ku Klux Klan—and the other is Mrs. Johnson†
Scene 2.2

Ku Klux Klan = white supremacist group in the United States

Definitions:

(1) (Ku Klux Klan)
racist, violent white supremacist groups in the United States, first formed after the Civil War to oppose Black freedom and equal rights

The original Klan in the late 1800s used terror, including threats, beatings, and lynchings, to keep formerly enslaved African Americans from voting or exercising their rights. Later versions of the Klan revived in the 1900s and still exist today as small white supremacist groups known for white-hooded robes, marches, and occasional acts of violence and intimidation.
(2) (meaning too rare to warrant focus)