Castanet

Castanets were a type of percussion instrument. While attending a party in 18th century France, the Tenth Doctor used his Zeus plugs as castanets and was unable to find them when he later needed them. (TV: The Girl in the Fireplace)

According to the Twelfth Doctor, Benedict IX "wove a spell" with her castanets. (TV: Extremis)

Castanét