The most common and most likely answer to this crossword clue is the 7 letter word CHAGALL
I've seen this crossword clue in Financial Times
C
H
A
G
A
L
L
More clues leading to the result CHAGALL
- Painter of article discovered among church brass
- Painter having drink — something bitter
- Artist’s conversation cut short with bitterness
- Painter‘s title describing witch
- Artist‘s ‘Old Witch’ in demand
- Artist having refreshing drink — it’s bitter
- Artist shows impertinence after tea
- Artist, name embodying hideous woman
- Name outstanding witch he painted
- Brief visit taking in crone
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.