Brad of "Troy” (4)
I believe the answer is:
pitt
'brad of troy' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pitt that I've seen before include "William --, who became Prime Minister at 24" , "Former British PM" , "Youngest-ever British prime minister, d. 1806" , "Elder and Younger PMs" , "One of two Tory prime ministers" .)