Dangerous, like a yeti (5)
I believe the answer is:
hairy
I believe this is a double definition.
'dangerous' is the first definition.
(I've seen this before)
'like a yeti' is the second definition.
(yetis are supposedly hairy)
(Other definitions for hairy that I've seen before include "Hirsute - dangerous" , "triggering alarm" , "Frightening - like a bear?" , "An ape may be" , "Like many dogs" .)