Listener with a revolutionary pain (7)
I believe the answer is:
earache
'pain' is the definition.
(earache is a kind of pain)
'listener with a revolutionary' is the wordplay.
'listener' becomes 'ear' (body part which hears or listens).
'with' says to put letters next to each other.
'revolutionary' becomes 'Che' (Che Guevara the Marxist revolutionary).
'ear'+'a'+'che'='EARACHE'
(Other definitions for earache that I've seen before include "Pain in aural organ" , "Pain in an aural appendage" , "minor complaint" , "may involve hammer and anvil" , "Form of torture" .)