Famous fiddler (4)
I believe the answer is:
nero
'famous fiddler' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for nero that I've seen before include "Cruel Roman emperor" , "Emperor, 'burnt' Rome" , "He's reputed to have fiddled while Rome burned" , "Barbarous Roman emperor" , "Emperor said to have started the fire that destroyed Rome" .)