Make a Feint to the East while Attacking in the West
Part of Secret Art of War
Move East then West, advance then retreat. When others expect you to act, don't act. When others don't expect you to act, take action.
Applying this stratagem to Go: it is a perfect description of a leaning attack. 'Leaning attack' means that you are attacking a group on one side in order to gain enough strength to attack your real target on the other side.
After Black has made a double kakari White "attacks" the marked black stone. Actually, she is not really attacking this stone, as this stone becomes stronger because of the subsequent sequence. The real aim here is to strengthen White's corner, then attacking the lone black stone at the top.
Also called motare.