Where one takes a risk, being on a slippery slope (3-5)
I believe the answer is:
off-piste
'on a slippery slope' is the definition.
(off-piste is away from prepared ski slopes)
'where one takes a risk' is the wordplay.
I cannot really see how this works, but
'one' could be 'o' (I've seen this in other clues) and 'o' is located in the answer.
'takes' could be 'is' (being is a kind of taking) and 'is' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'being' is the link.
Can you help me to learn more?
(Other definitions for off-piste that I've seen before include "Away from the regular runs in skiing" , "On unauthorised ski slope" , "Away from prepared ski runs" .)