The most common and most likely answer to this crossword clue is the 6 letter word SATORI
I've seen this crossword clue in The Guardian
S
A
T
O
R
I
More clues leading to the result SATORI
- Enlightenment leads to turning out in Eastern dress
- One rolls over in sudden awakening
- Day BoJo strips off facade to provide enlightenment
- A trio’s excited to find spiritual enlightenment
- Special artificial intelligence takes in hill for enlightenment
- Awakening back when given to religious instruction
- Zoroastrians will have form of this Buddhist aim at heart
- One rolls around to find enlightenment
- I degenerate when getting raised awareness all of a sudden
- Enlightenment from a mountain in centre of Asia
Buddy explains!

The straight part
We know that "enlightenment" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case enlightenment = satori.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 SATORI mean?
SATORI noun- A sudden inexpressible feeling of inner understanding or enlightenment.