A combination of the two words, 'Saxophone' and 'Section Leader.'
Therefore, only Saxophone Section Leaders (SSL) may be called Saxtion Leaders.
"Saxtion Leaders know where it's at, unlike any other section leaders in the band."
"Who is that saxy girl over there? Oh, wait, that's the superior Saxtion Leader!"
The section leader of the saxophone section, often arrogant.
noob: Who's that?
other guy: That's the saxtion leader.