The most common and most likely answer to this crossword clue is the 14 letter word IMPRESSIONISTS
I've seen this crossword clue in Financial Times
I
M
P
R
E
S
S
I
O
N
I
S
T
S
More clues leading to the result IMPRESSIONISTS
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.
What does IMPRESSIONISTS mean?
IMPRESSIONISTS noun- One who adheres to the theory or method of impressionism.