Fulminate about common idea brought up in dispatches (9)
I believe the answer is:
reportage
'fulminate about common idea brought up in dispatches' is the definition.
I can't tell whether this definition defines the answer.
'fulminate about common idea brought up in' is the wordplay.
'fulminate' becomes 'rage' (I've seen this in another clue).
'about common idea' becomes 'trope' (I can't justify this - if you can you should give a lot more credence to this answer).
'brought up' says the letters should be written backwards (in a down clue, letters go up).
'in' means one lot of letters goes inside another.
'trope' backwards is 'eport'.
'rage' going around 'eport' is 'REPORTAGE'.
Can you help me to learn more?
(Other definitions for reportage that I've seen before include "Factual journalism" , "Press accounts" , "Style of one making documentary" , "Journalist's work" , "News presentation" .)