The term 'woodwind part' can be summarized by the crossword solution 'REED, ' which is a four-letter word. A REED is a thin strip of material, usually made of wood or metal, that vibrates to produce sound when air is blown through it. It is commonly used in woodwind instruments such as clarinets, saxophones, and oboes. The REED is placed in the mouthpiece of the instrument and is responsible for producing the desired sound.