The most common and most likely answer to this crossword clue is the 10 letter word CEREMONIAL
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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 CEREMONIAL mean?
CEREMONIAL noun- A ceremony, or series of ceremonies, prescribed by ritual.
- Of, relating to, or used in a ceremony.
- Observant of ceremony, ritual, or social forms.