Your definition of governance is too broad. It must have legal authority to conduct the affairs of a political unit. A strong man who tells people what to do and it's only listened to because of fear of force is not a government. A person chosen to speak for a group but who has no authority is not a government. My boss only has authority over me in regards to my work duties, and that is only at my consent...I can choose at any time to say "I'm not going to work for you" and he has no authority over me at that point.

Words have meanings, and a government requires more than just a leader.