Cryptic crossword clue
Doctor finds a clue is not secret 12

The most common and most likely answer to this crossword clue is the 12 letter word UNCLASSIFIED

I've seen this crossword clue in The Times
U
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Buddy explains!

The straight part
We know that "not secret" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case not secret = unclassified.
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 UNCLASSIFIED mean?

UNCLASSIFIED adjective
  1. Not classified
UNCLASSIFIED verb
  1. To declassify.

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