Perilous (5)
'perilous' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for dangerous that I've seen before include "Harmful, injurious" , "Hairy" , "Hazardous" , "Insecure" , "likely to blow up" .)
'perilous' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for risky that I've seen before include "Having possibility of danger or loss" , "admitting possibility of unpleasant outcome" , "Perilous" , "too adventurous" , "Involving a chance of danger" .)
'perilous' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for unsafe that I've seen before include "Hazardous" , "Not reliable, dangerous - perhaps a legal conviction" , "Risky - inadequately evidenced" , "Unreliable" , "giving no protection" .)