Ceremony in which one has a right to be heard (4)
I believe the answer is:
rite
'ceremony in which one' is the definition.
'rite' can be an answer for 'ceremony' (rite is a kind of ceremony). I am not certain of the remainder of the definition.
'a right to be heard' is the wordplay.
'to be heard' indicates a 'sounds like' (homophone) clue.
'right' sounds like 'RITE'.
'has' acts as a link.
Can you help me to learn more?
(Other definitions for rite that I've seen before include "Tire of ceremony" , "Tries awkwardly to perform rituals" , "something like mass" , "Custom" , "Established religious ceremony" .)