Charles E. Clift Jr., 68, a retired Federal Communications Commission official and a former journalist, died of Alzsheimer's disease Monday at Washington Hospital Center.

Mr. Clift began work with the FCC in 1940, and retired in 1973. During this time he investigated conflicts of interest in broadcast ownership as an official in the economic section. He then was a broadcast specialist, working on studies of newspaper-broadcast co-ownership.

From the mid of the late 1950s, he was on the staff of The Reporter, where he worked on a number of articles on wire-tapping and the China lobby. His work was instrumental in the magazine's winning a special George Polk Memorial Award.

Mr. Clift was born in Wilkes-Barre, Pa., and earned a bachelor's degree at Princeton University.

After spending four years as an investigator with the American Civil Liberties Union in New York City, he moved to Washington in the mid-1930s and joined the staff of the La Follette Senate committee that held hearings in California.

He served in the Army in Europe during World War II.

Mr. Clift was a member of the National Press Club.

He is survived by his wife, Kathleen R., of the home in Washington; two daughters, Alice C. Giles, of Watertown, N.Y., and Dorothy Ann, of Washington, a son; Charles E. III, of Athens, Ohio; a brother, Arthur H., of New York City; two sisters, Mrs Lansing Carpenter, of Haddam, Conn., and Grace Clift,of Central Valley, N. Y., and five grandchildren.