### Clue: Music produced by some person at an instrument (6)
### Answer: SONATA 
 ### Explanation: Definition: Music
Hidden in perSON AT An instrument, with a redundant word to make the whole clue a definition (I won't call it &lit as the structure isn't right), as a sonata is an instrumental piece (though ti can be for more that one), as opposed to a cantata, which is sung.