fictional detective Wolfe (4)
I believe the answer is:
nero
'fictional detective wolfe' 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 "Fiddling Roman emperor" , "He's reported to have fiddled while Rome burned" , "Notorious Roman emperor, d. AD 68" , "Emperor, 'burnt' Rome" , "Emperor said to have started the fire that destroyed Rome" .)