Augury (4)

I believe the answer is:
omen
'augury' is the definition.
(omen is a kind of augury)
This is the entire clue.
(Other definitions for omen that I've seen before include "Harbinger, augury" , "Augury, portent" , "Portent, prophetic indicator" , "Gloomy sign" , "Prognostication" .)