Drank one, doctor, and I went to bed (7)

I believe the answer is:

imbibed

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'drank' is the definition.
('imbibe' can be a synonym of 'drink')

'one doctor and i went to bed' is the wordplay.
'one doctor' becomes 'mb' (Bachelor of Medicine, Medicinae Baccalaureus).
'and' says to put letters next to each other (I've seen this in other clues).
'went to' becomes 'i' (I can't explain this - if you can you should give a lot more credence to this answer).
'mb' after 'i' is 'imb'.
'imb'+'i'+'bed'='IMBIBED'

Can you help me to learn more?

(Other definitions for imbibed that I've seen before include "Drank (alcohol)" , "Drunk" .)

I've seen this clue in the Evening Standard.

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