Clue: Stock answer about new and current Bullingdon Club members, say (8)
Answer: OXONIANS
Explanation: Definition: Bullingdon Club members, say
N (new) + I (electric current) in ~~OX (part of the stock on a farm)~~ OXO (stock cube) + ANS. The Bullingdon is a posh drinking club at Oxford University, which famously once had David Cameron and Boris Johnson as members *(Thanks to Roger N for correction)