The most common and most likely answer to this crossword clue is the 8 letter word OBSCURES
I've seen this crossword clue in Financial Times
O
B
S
C
U
R
E
S
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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 OBSCURES mean?
OBSCURES verb- To render obscure; to darken; to make dim; to keep in the dark; to hide; to make less visible, intelligible, legible, glorious, beautiful, or illustrious.
- To hide, put out of sight etc.
- To conceal oneself; to hide.