Speech to which no one replies (9)
I believe the answer is:
soliloquy
'speech' is the definition.
(I know that soliloquy is a type of speech)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for soliloquy that I've seen before include "Monologue" , "Dramatic speech presenting "unspoken" reflections" , "Speech performed to oneself" .)