to do a Melba To make several farewell performances or comebacks. (1971 —) . Sydney Morning Herald It has been intensified by talk from Sir Robert that he is under pressure to stay on, thus giving rise to speculation that he is planning to 'do a Melba' (1974).
[From the name of Dame Nellie Melba (stage name of Helen Mitchell) ((1861 — 1931)), Australian soprano, who was famous for being unable to retire conclusively.]