Utter, voice (7)
I believe the answer is:
express
This clue is a double definition.
'utter' is the first definition.
(synonyms)
'voice' is the second definition.
(I've seen this before)
(Other definitions for express that I've seen before include "Put into words - quick!" , "set forth" , "Utter - direct" , "Of train, travelling rapidly with few or no stops" , "Convey in words; train" .)