Slippery, perhaps (3)
I believe the answer is:
icy
'slippery perhaps' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for icy that I've seen before include "(Of relations) very hostile" , "Posing danger on the road" , "Very cold, hostile" , "frozen over!" , "Freezing and slippy" .)