at the top of the tree
at the top of the treeBRITISH
COMMON If someone is at the top of the tree, they are in the highest position in an organization or in their profession. She has been at the top of the acting tree for 35 years. Note: You can also say that someone is top of the tree. As a cricketer he is top of the tree and we will see that when the time comes if he is picked for India.