The term 'PART OF A BAGPIPE' can be broken down into two crossword solutions: CHANTER (7 letters) and REED (4 letters). The CHANTER is the main pipe of the bagpipe, which produces the melody. It has finger holes that are used to change the pitch of the notes. The REED is a small piece of wood or metal that vibrates when air is blown through it, creating sound. It is attached to the CHANTER and is responsible for the bagpipe's distinctive sound.