Former British prime minister Benjamin (8)
I believe the answer is:
disraeli
'former british prime minister benjamin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for disraeli that I've seen before include "Victorian prime minister" , "Victorian politician" , "English PM and novelist" , "Benjamin ........ 19th century English P.M." , "Benjamin -, nineteenth century PM" .)