Phonograph inventor (6)
I believe the answer is:
edison
'phonograph inventor' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for edison that I've seen before include "Inventor's" , "Incandescent light inventor" , "Inventor with over 1,000 US patents to his name, d. 1931" , "Thomas --, US?inventor" , "Inventor of the light bulb" .)