The term 'high-pitched wind instrument' can be summarized by two crossword solutions: OBOE (4 letters) and FLUTE (5 letters). The OBOE is a double reed woodwind instrument that produces a mellow, reedy sound. It is commonly used in classical music and is known for its distinctive tone. The FLUTE is a woodwind instrument that produces a bright, airy sound. It is often used in jazz, folk, and classical music and is known for its ability to produce high-pitched notes.