Let out, say (5)
I believe the answer is:
utter
I believe this clue is a double definition.
'let out' is the first definition.
(thesaurus)
'say' is the second definition.
(thesaurus)
(Other definitions for utter that I've seen before include "Speak; completely" , "Positive" , "(Of counterfeit money) put into circulation - say" , "State - unqualified - rank" , "Give tongue to" .)