Benjamin —, prime minister (8)
I believe the answer is:
disraeli
I believe this is a double definition.
'benjamin' is the first definition.
(I've seen this before)
'prime minister' is the second definition.
(Benjamin Disraeli, Victorian prime minister)
(Other definitions for disraeli that I've seen before include "Ali dries out for the former British prime minister" , "prime minister, in the past" , "Jane Austen novel" , "One of Queen Victoria's prime ministers" , "Raise lid on this old British prime minister" .)