The most common and most likely answer to this crossword clue is the 10 letter word CLASSICISM
I've seen this crossword clue in The Guardian
C
L
A
S
S
I
C
I
S
M
Buddy explains!
The straight part
We know that "artistic movement" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case artistic movement = classicism.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.
What does CLASSICISM mean?
CLASSICISM noun- All the classical traditions of the art and architecture of ancient Greece and Rome, especially the aspects of simplicity, elegance and proportion.
- Classical scholarship.
- A Latin or Ancient Greek expression used in an English sentence.