Supportive press article (6)
I believe the answer is:
column
'press article' is the definition.
(I know that column is a type of opinion article)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for column that I've seen before include "Convulsive muscular contraction" , "Nelson's pillar" , "Body of troops" , "Round pillar or newspaper article" , "Tower" .)