Benjamin, 1st Earl of Beaconsfield (8)
I believe the answer is:
disraeli
This clue is a double definition.
'benjamin' is the first definition.
(I've seen this before)
'1st earl of beaconsfield' is the second definition.
(I've seen this in another clue)
(Other definitions for disraeli that I've seen before include "Benjamin --, former PM" , "One of Queen Victoria's prime ministers" , "Victorian politician" , "Queen Victoria's favourite prime minister, d. 1881" , "Jane Austen novel" .)