Angry journalist is thwarted (7)
I believe the answer is:
crossed
'thwarted' is the definition.
('cross' can be a synonym of 'thwart')
'angry journalist' is the wordplay.
'angry' becomes 'cross' (cross can mean annoyed or angry).
'journalist' becomes 'ed' (short for editor).
'cross'+'ed'='CROSSED'
'is' acts as a link.
(Other definitions for crossed that I've seen before include "Came over and < annoyed" , "Passed" , "Went over to the other side" , "Intersected; opposed" , "Traversed" .)