score
It is called a 'score'
A short musical idea can be called a number of things. It can be called a phrase or motif for example.
An "understudy."
It is called East High School, also known as the Wildcats. East High School is said to be in Albuquerque. Their rival school is West High School, also known as the Knights.
score
score
It is called a 'score'
It is called a 'score'
It is called a 'score'
A composer.
It is called a score or sheet music.
It is called an autograph.
A numbered musical piece might be called a concerto, an opus, or a composition. It could also be called a symphony.
amanuensis
Manuscript
Mona Mender has written: 'Music manuscript preparation' -- subject(s): Musical notation