Like an unfriendly stare (3)
I believe the answer is:
icy
'like an unfriendly stare' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for icy that I've seen before include "(Of relations) very hostile" , "unsympathetic" , "Freezing cold" , "Posing danger on the road" , "Glacial" .)