Forecaster getting editor to show anger (3,3)
I believe the answer is:
see red
'anger' is the definition.
('see red' can be a synonym of 'anger')
'forecaster getting editor' is the wordplay.
'forecaster' becomes 'seer' (I've seen this before).
'getting' says to put letters next to each other.
'editor' becomes 'ed'.
'seer'+'ed'='SEE RED'
'to show' is the link.
(Other definitions for see red that I've seen before include "Be suddenly angry - like bull?" , "get angry" , "Lose the head as bull might" , "Burst a blood vessel" , "blow a gasket" .)