Sleuth Wolfe (4)
I believe the answer is:
nero
'sleuth 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 "Roman 9" , "Matricidal emperor" , "He's reported to have fiddled while Rome burned" , "Emperor said to have started the fire that destroyed Rome" , "Emperor said to have fiddled as Rome burned" .)