The most common and most likely answer to this crossword clue is the 6 letter word UNSAFE
U
N
S
A
F
E
More clues leading to the result UNSAFE
- Dangerous guns: a few scaled back
- Use fan on the blink? That’s risky
- Dodgy sun-baked starter removed from eatery
- With lack of good evidence thus lots’re set free – as true felons?
- Use fan improperly, creating hazard
- Where peacekeepers send their reserves, based on dodgy evidence?
- Use fan wrongly – risky
- 21’s false leg’s beginning to go
- Extremes of uneven sea, fearsome and perilous
- Use fan that’s faulty and dangerous
Buddy explains!

The straight part
We know that "perilous" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case perilous = unsafe.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 UNSAFE mean?
UNSAFE adjective- Not safe (various senses); dangerous.