The most common and most likely answer to this crossword clue is the 6 letter word ARCANE
I've seen this crossword clue in The Guardian
A
R
C
A
N
E
More clues leading to the result ARCANE
- Obscure place to shop, having note for daughter
- Mysterious quantity of film probing most of region
- Mysterious king facing defeat after year
- Secret place for entertainment — any number coming in for day
- Secret arena newly built to accommodate a hundred
- Mysterious vessel in time capsized
- Esoteric
- Something quite clear can easily become mysterious
- Tsar can earn mostly in secret
- Obscure English composer with introduction of vacuous cantata
Buddy explains!
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 ARCANE mean?
ARCANE adjective- Understood by only a few.
- (by extension) Obscure, mysterious.
- Requiring secret or mysterious knowledge to understand.
- Extremely old (e.g. interpretation or knowledge), and possibly irrelevant.