A risk of severe cold snap? (8)
I believe the answer is:
exposure
'a risk' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for exposure that I've seen before include "Risk for Antarctic explorer" , "Disclosure (by camera?)" , "The harmful effects on the body of extreme cold" , "Lack of shelter" , "that is brought to light?" .)