The most common and most likely answer to this crossword clue is the 11 letter word PHILISTINES
I've seen this crossword clue in Financial Times
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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 PHILISTINES mean?
PHILISTINES noun- A person who is ignorant or uneducated; specifically, a person who lacks appreciation of or is antagonistic towards art or culture, and who has pedestrian tastes.