Portend, bode (5)
I believe the answer is:
augur
This clue is a double definition.
'portend' is the first definition.
(synonyms)
'bode' is the second definition.
(synonyms)
(Other definitions for augur that I've seen before include "Presage, portend" , "A sign of something to come" , "Presage, foretell" , "Bode; soothsayer" , "Roman diviner" .)