To "become a lawyer" means to undergo the process of training, education and passing the bar examination in order to become qualified and authorized to practice law. Full definition
The ideal candidate has completed at least Third Year, has attained at least a B + average, and is interested in becoming a lawyer in the area of litigation. (litigation-help.com)
This is all part of being a lawyer and communicating effectively with your client — something that I definitely did not think about before becoming a lawyer. (firemanlawyers.com)
For the incorporation example just mentioned, this means setting a goal of becoming the lawyer for a growing and prosperous business that will need help with other legal issues in coming years. (slaw.ca)