The team, we hear, expressed discontent (6)
I believe the answer is:
sighed
'expressed discontent' is the definition.
The answer and definition can be both to do with communicating as well as being past participle verbs.
Perhaps you can see a link between them that I don't see?
'the team we hear' is the wordplay.
'the team' becomes 'side' (both can mean a sports team).
'we hear' indicates a 'sounds like' (homophone) clue.
'side' sounds like 'SIGHED'.
Can you help me to learn more?
(Other definitions for sighed that I've seen before include "Breathed wearily" , "He digs ( anag.)" , "Showed exasperation" , "expressed resignation, say" , "Made yearning sound" .)