Believe it or not, Clip has grayscale. Gosh it took me waay too long to find it!
Click Layer at the top, then go to Convert Layer. There it will give you the option to Color, Gray, or Monochrome the chosen layer. Gray is the grayscale, of course.
…of course, it took one of my friends to find out about this. Goodness, I don’t search around well enough. XD They found this on a Sai board.
Oh well. Soon I should at least be able to get some things to work. XD