The most common and most likely answer to this crossword clue is the 5 letter word RISKY
I've seen this crossword clue in The Sunday Telegraph
R
I
S
K
Y
More clues leading to the result RISKY
- Precarious run: one shown on satellite TV
- Take current weather — unreliable
- Perilous run: one very high place!
- Hairy rebellious Irish broadcaster
- Run independent broadcaster? That’s uncertain
- Dangerous raid, oddly, on broadcaster
- Dangerous rig unfinished, limit to achievement?
- Retired Irish broadcaster liable to mishap
- Gambolling not at first sight like gambling?
- Dangerous state in East — heavens above
Buddy explains!

The straight part
We know that "Dangerous" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dangerous = risky.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 RISKY mean?
RISKY adjective- Dangerous, involving risks.