Voice, as grievances (3)
I believe the answer is:
air
'voice as grievances' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for air that I've seen before include "Atmosphere; appearance" , "Ventilate with oxygen" , "Ventilate, say grievance" , "Divulge" , "distinctive quality" .)