The most common and most likely answer to this crossword clue is the 8 letter word LEGALISM
I've seen this crossword clue in The Guardian
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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 LEGALISM mean?
LEGALISM noun- A philosophy of focusing on the text of written law to the exclusion of the intent of law, elevating strict adherence to law over justice, mercy, grace and common sense.
- A doctrine of salvation by strictly adhering to the requirements of divine law.
- A legal axiom, term or rule.