The first "E" stands for "Empowering others" or "Empowerment."
According to the Business Dictionary, Empowerment is
"A management practice of sharing information, rewards, and power with employees so that they can take initiative and make decisions to solve problems and improve service and performance.
Empowerment is based on the idea that giving employees skills, resources, authority, opportunity, motivation, as well holding them responsible and accountable for outcomes of their actions, will contribute to their competence and satisfaction."
For me it is a leadership trait because only those who are secure and confident are willing and passionate enough (beyond a "practice") to help others become better and maybe even replace them someday. In fact that is one reason why I started this blog. Personally, I have learned more as I shared and empowered those around me to improve themselves. Empowering others is mutually-beneficial because as others are better able to do some of the things you do so well, you are freed up to step up and take on new challenges. Empowering others is a self-improvement tool by way of developing others personally and professionally.
** Read more: http://www.businessdictionary.com/definition/empowerment.html