From one couple behind another: Do a Cloverleaf and then the trailing couple does a Merge (each dancer stands to the right of the dancer ahead) to form a line of four.
NOTE: Can be called directionally as Cloverleaf and Merge if dancers are familiar with Merge (See Merge in the Controversial Section).
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.
