Cryptic crossword clue
Clear observation: rigged prices preceding bill received in regret 12

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

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

The straight part
We know that "Clear observation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case clear observation = perspicacity.
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 PERSPICACITY mean?

PERSPICACITY noun
  1. Acute discernment or understanding; insight.
  2. The human faculty or power to mentally grasp or understand clearly.
  3. Keen eyesight.

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