The most common and most likely answer to this crossword clue is the 5 letter word BOSCH
I've seen this crossword clue in Independent
B
O
S
C
H
More clues leading to the result BOSCH
- Belgium's principal old school artist
- A hundred bunk beds for artist
- Artist offering nonsense about source of colour
- British old school painter
- A painter? Utter nonsense!
- . Child burdened with books, not OK with a Nobel laureate
- Dutch painter from jumbo school
- Dutch painter to finish off the Polish soup without the king
- Utter poppycock! He was a Dutch painter
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 = bosch.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.