Soloist on label rewound tape (3-3,4)
I believe the answer is:
one-man band
'label rewound tape' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'soloist on' is the wordplay.
I cannot quite see how this works, but
'on' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for one-man band that I've seen before include "Sole trader" , "Single person running a business" , "Multitasking musician" , "He provides his own accompaniment" .)