Staff opening is a term used to describe a job vacancy for a musician. The four crossword solutions for this term are CLEF (4 letters), REST (4 letters), Tenorclef (9 letters) and Trebleclef (10 letters). CLEF is a musical symbol used to indicate the pitch of written notes, while REST is a musical notation signifying a silence of a certain duration. Tenorclef and Trebleclef are both types of clefs, with Tenorclef being used to notate higher-pitched instruments such as violins and Trebleclef being used to notate lower-pitched instruments such as cellos.