Intimidate, with "down" (5)
I believe the answer is:
stare
'intimidate with down' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stare that I've seen before include "Rates (anag.)" , "Gaze fixedly" , "bird" , "Long fixed look" , "Look with fixed gaze" .)