Calzetta (f)
(with) definite article: la3rd piece of a larger composed drone, remotest from the stock
According to Izzi, the tuning piece of the drone; NB: Compare Cauzetta (mortise).
Izzi, Franco: Scapoli: realtà storiche e culturali di consapevolezza tradizionale. Scapoli, 1994, p.27.