"Moxie" is a word that implies force of character. From a leadership perspective think of it as followability (a new word for your dictionary!). Leaders with moxie tend to behave/think in ways that attract others to the cause.
Lots of leaders have moxie. Many don't.
One of the hallmark traits of leaders with moxie is that they have the ability to make people feel better - better about themselves, better about the work, better about the team.
Moxie is a pretty powerful ingredient in achieving high performance status. I'm pretty sure we don't need to aim for anything less.