Drink is the reason to accept some risk (6)
I believe the answer is:
whisky
'drink' is the definition.
(whisky is a kind of drink)
'is the reason to accept some risk' is the wordplay.
I cannot really see how this works, but
'is' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for whisky that I've seen before include "reportedly available for Thin Lizzy gig?" , "Alcoholic drink" , "W in radio alphabet" , "Grain alcohol" , "Scotch" .)