Enter a clue or pattern or both:
The Clue
Indispensable, in music (9 letter answer)
The Answer
OBBLIGATO
Tags
Notes
The answer OBBLIGATO is so rare that it appears less than once every 2500 puzzles.
Definition
OBBLIGATO as a noun:
1. (obbligato, obligato) = a persistent but subordinate motif
2. (obbligato, obligato) = a part of the score that must be performed without change or omission