Roman fiddler (4)
I believe the answer is:
nero
'roman fiddler' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nero that I've seen before include "Famous fiddler" , "Roman emperor, d. AD68" , "Emperor said to have started the fire that destroyed Rome" , "Emperor, 'burnt' Rome" , "Emperor said to have fiddled as Rome burned" .)