Dutch artist, informally at home, about to pour out drinks (7)
I believe the answer is:
vincent
'dutch artist informally' is the definition.
I can't judge whether this definition defines the answer.
'at home about to pour out drinks' is the wordplay.
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'about' becomes 'c' (circa).
'to pour out' becomes 'vent' (I can't justify this - if you can you should believe this answer much more).
'drinks' indicates putting letters inside (inserted letters are consumed or drunk).
'in'+'c'='inc'
'inc' inserted into 'vent' is 'VINCENT'.
Can you help me to learn more?
(Other definitions for vincent that I've seen before include "Van Gogh's first name" , "See 21 Across" , "man" , "Fellow" , "boy" .)