Sentence:  Mr. Black is a kindly, gentle, fine individual, but as a leader, an up-to-date fellow, a go-getter—why he just doesn't know the first thing about it. . . . In a growing community like Douglaston we need a <WSD>live wire</WSD>. 
Meaning of the word marked with <WSD> tags:  An especially energetic, alert, or vivacious person.