Much nationwide suffering after revolution spread (7)
I believe the answer is:
effused
'spread' is the definition.
(effuse means to spread or transmit)
'much nationwide suffering after revolution' is the wordplay.
'much' indicates a hidden word (many of the letters in the clue).
'after revolution' says the letters should be written in reverse (letters revolve back).
'desuffe' is hidden within 'nationwide suffering'.
'desuffe' written backwards gives 'EFFUSED'.
(Other definitions for effused that I've seen before include "spread out" , "Poured out" .)