In Clover Meaning

Example : 1854, Charles Dickens, Hard Times, ch. 26:  [S]he resigned herself with noble fortitude to lodging, as one may say, in clover, and feeding on the fat of the land.1993, James R. Gaines, "From the Managing Editor," Time, 16 Aug.:  They tell Sasha, "There is big money here. You and the kids can get real decent money and live in clover the rest of your lives."1875, Anthony Trollope, The Way We Live Now, ch. 55:  Shelter at Carbury Manor was very much more comfortable than the priest's own establishment, even with the roof on, and Father Barham was in clover.