
1) Electronic musical instrument
Found on
https://www.crosswordclues.com/clue/radiodrum

The Radiodrum or radio-baton is a musical instrument played in three-dimensional space using two mallets (snare drum sticks with wires). It was developed at Bell Labs in the 1980s (and patented), originally to be a three-dimensional computer mouse. Currently it is used as a musical instrument similar to a MIDI controller in the sense that it has n...
Found on
http://en.wikipedia.org/wiki/Radiodrum
No exact match found.