The most common and most likely answer to this crossword clue is the 7 letter word CEZANNE
I've seen this crossword clue in The Times
C
E
Z
A
N
N
E
More clues leading to the result CEZANNE
- Enclosed frames something Walton’s on about for artist
- French artist‘s in the auditorium, according to Stuart monarch
- Artist who admired 11 according to old queen on the radio
- Painter, unknown character meeting queen after church
- Artist‘s base unknown in French resort virtually
- French artist's in the auditorium, according to Stuart monarch
Buddy explains!

The straight part
We know that "artist" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case artist = cezanne.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.