From a one quarter tag formation: The two ends of the wave step ahead and Turn Thru with the "Belle" of the outside pairs to form a (temporary) two faced line in the center. Outside pair face each other and Turn Thru as the centers bend the line and Pass Thru. Finishes in lines facing out.
Paul McNutt 1976
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.