From column formation: Lead individual in each file of four promenades in single file around the end of the other file, moves down toward the head of that file and faces in. Second person in each column steps forward and does a Cloverleaf to come back in and stand beside and to the right of the lead person from the other column. The trailing two in each column move forward into box formation and arm turn adjacent dancer 3/4 and step ahead. Finishes in right hand waves (if started in right hand columns).
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.