A harpsichord was a musical instrument. It was one of several instruments which the Eighth Doctor could play. (PROSE: The Year of Intelligent Tigers)
The Doctor had a harpsichord in the TARDIS. He kept a first aid kit under it. (PROSE: Genocide)
Steven Taylor could play the harpsichord. (AUDIO: Frostfire)
Prince Edward of Beaufort had a harpsichord in his throne room. (PROSE: Deceit)