From facing half sashayed couples: Star Twirl with facing dancer then Left Star Twirl with the new facing dancer (i.e., Left Star Thru then California Whirl). Finishes in exact starting set up.
From a squared set with regular couples: Do a Star Twirl with the couple you face, then do a Left Star Twirl with the inactives. Finishes in facing lines with couples half sashayed.
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.