The most common and most likely answer to this crossword clue is the 6 letter word DICIER
I've seen this crossword clue in The Daily Telegraph
D
I
C
I
E
R
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 DICIER mean?
DICIER adjective- Fraught with danger.
- Of uncertain, risky outcome.
- Of doubtful or uncertain efficacy, provenance, etc.; dodgy.
- Nauseating, rank.