The term 'orchestra tuner' can be broken down into two crossword solutions: oboist (6 letters) and OBOE (4 letters). An oboist is a musician who plays the OBOE, a woodwind instrument. The OBOE is a double-reed instrument that produces a unique sound. An orchestra tuner is responsible for tuning the instruments in an orchestra to ensure they are all in tune with each other. They also help maintain the instruments and make sure they are in good condition.