the.com/bandleader

means The person who leads a band — hiring the musicians, picking the songs, setting the tempo, and taking the blame or glory for how the whole thing sounds.

from A straightforward compound of 'band' (a company of musicians, from the older sense of 'band' as a group bound together — itself from the same root as 'bind') and 'leader.' The word settled into English as dance bands and big bands became big business, giving the person waving the baton or counting off the beat a proper job title to match the paycheck.