The most common and most likely answer to this crossword clue is the 10 letter word MYSTERIOUS
I've seen this crossword clue in The Daily Telegraph
M
Y
S
T
E
R
I
O
U
S
More clues leading to the result MYSTERIOUS
- Cryptic item’s yours to be solved
- Peculiar way to represent tourism? Yes
- I’ll be critical about time needed for cryptic
- Your items getting rearranged by poltergeists ultimately? Very curious
- Possibly stymies our secret
- Puzzle misery to us puzzling
- Intriguing story I use in translation by Frenchman
- Strange modus operandi involving unknown rites troubled us
- This compiler’s critical taking time for cryptic
- The writer’s in earnest about time creating a puzzle
Buddy explains!

The straight part
We know that "cryptic" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cryptic = mysterious.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 MYSTERIOUS mean?
MYSTERIOUS adjective- Of unknown origin.
- Having unknown qualities.
- Difficult to understand.
- Deliberately evasive or enigmatic.