The most common and most likely answer to this crossword clue is the 7 letter word GAUGUIN
I've seen this crossword clue in The Daily Telegraph
G
A
U
G
U
I
N
More clues leading to the result GAUGUIN
- Painter in drink most of a month
- 6 celebrated, shedding stones, cutting drink
- Good promise falling short in artist
- Artist losing way in part of summer, tucking into booze
- Artist spending two-thirds of the month in drink
- Artist fashionable after good month at university
- Computing with uniform input, no good in the end for an artist
Buddy explains!

The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.