Start talk having necked one drink (9)

I believe the answer is:

originate

I'm a little stuck... Click here to teach me more about this clue!

'start' is the definition.
('originate' can be a synonym of 'start')

'talk having necked one drink' is the wordplay.
'talk' becomes 'orate' (orating is a kind of talking).
'having' is an insertion indicator.
'necked one' becomes 'i' (Roman numeral. I am not sure about the 'necked' bit.**).
'drink' becomes 'gin' (gin is a kind of drink).
'i'+'gin'='igin'
'orate' enclosing 'igin' is 'ORIGINATE'.

Can you help me to learn more?

(Other definitions for originate that I've seen before include "Invent" , "Create, initiate" , "Create; begin" , "Arise, start" , "Bring into existence" .)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.