Emperor during the Great Fire of Rome
I believe the answer is:
nero
'emperor during the great fire of rome' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nero that I've seen before include "Roman Emperor, 54-68 AD" , "Notorious Roman emperor, d. AD 68" , "Imperial Roman fiddler" , "Famous fiddler" , "Emperor who played the fiddle" .)