Type of harpsichord (6)
I believe the answer is:
spinet
'type of harpsichord' is the definition.
This is the entire clue.
(Other definitions for spinet that I've seen before include "Small 12" , "Instep (anag)" , "Old keyboard instrument" , "Harpsichord-like keyboard instrument" , "Instrument resembling a small harpsichord" .)