Begin to talk about one taking to drink (9)
I believe the answer is:
originate
'begin' is the definition.
(I know that begin is a is a more specific form of the action of originate)
'talk about one taking to drink' is the wordplay.
I cannot quite understand how this works, but
'about' could be 'a' (abbreviation in Chambers) and 'a' is found in the answer.
'one' could be 'i' (Roman numeral) and 'i' is located in the answer.
'drink' could be 'gin' (gin is an alcoholic drink) and 'gin' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for originate that I've seen before include "Arise, start" , "pioneer" , "Launch" , "Come into existence" , "Set up" .)