MABEL KLINKERMabel Kronder Klinker of Tiburon, died yesterday at a local convalescent hospital after a brief illness. She was 86.A native of San Francisco, Mrs. Klinker lived there all her life until she moved to Marin a few months ago.She is survived by two daughters. Mrs. William H. Johnson of Tiburon and Mrs. Richard George of Redwood City; a brother. Howard P. Kroder of Medford. Ore.; four grandchildren and four great-grandchildren.A memorial service is planned, but a date has not been set.Inurnment wiii be at MountTamalpais Cemetery.Memorial contributions to the American Cancer Society are preferred.