From lines facing out: Ends "Cloverleaf" then move into the center and Slide Thru. Meanwhile, original centers Partner Trade and finish on the outside. Finishes in double pass thru or eight chain thru formation. (The Slide Thru makes the movement non sex dependent, but can give some strange ending formation).
Dick Pells 1973
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.