To set to rights; to clean up. The N.E.D. furnishes 16th c. Scottish examples. The word came into the U.S. by means of settlers from Scotland.
1842. I never used to red up their chamber without thinking of it.Phila. Spirit of the Times, Aug. 12.
1896. You got your front room red up, Emarine? No; I aint had time to red up anything.Ella Higginson, Tales from Puget Sound, p. 132.