"Yield" means to give in. At a stop sign, you yield the right-of-way to someone else and allow them to go first.
In this case, something is trying lead a person in a certain direction, and instead of fighting against it, the person is allowing himself to be lead. He is yielding to its leading.
("Yield" can also mean to produce. It's often used to mean that with farming. But that's not how it's being used right here.)