Cryptic crossword clue
Greek character is tense, failing to reach conclusion 3

The most common and most likely answer to this crossword clue is the 3 letter word TAU

I've seen this crossword clue in The Times
T
A
U


Buddy explains!

The straight part
We know that "Greek character" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case greek character = tau.
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 TAU mean?

TAU noun
  1. The letter Τ/τ in the Greek, Hebrew and ancient Semitic alphabets, being the nineteenth letter of the Classical and Modern Greek, the twenty-first letter of Old and Ancient Greek.
  2. A Τ-shaped sign or structure; a Saint Anthony's cross, sometimes regarded as a sacred symbol.
  3. A tau meson, now usually known as a kaon.
  4. An unstable heavy lepton, which decays into a muon or electron; a tauon.
  5. Tau protein, a type of protein that stabilizes microtubules in the human central nervous system, failures of which are associated with forms of dementia.
  6. A measurement of the sensitivity of the value of an option to changes in the implied volatility of the price of the underlying asset.
  7. An irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its radius, approximately 6.2831853071; equal to twice the value of pi. Often written τ or 2π.

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