Definitions of lead
if a barrister (a UK and commonwealth lawyer that is allowed to plead for a client in the lower and higher courts) leads then he or she is the main barrister of a team of two or more barristers representing the same client in court
I will lead the case, with Mr Bailey as my junior.
to cause something to happen or someone to do something
The report into alleged corruption at Fifa could lead to criminal charges.
to control a situation, country, or a group of people etc
Louisiana State Police continues to lead the investigation, while the FBI is "closely monitoring" the situation.