Echo fills empty brothel with deep, booming sound (6)
I believe the answer is:
bellow
'booming sound' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'echo fills empty brothel with deep' is the wordplay.
'echo' becomes 'e' (phonetic alphabet: alpha, bravo, charlie etc.).
'fills' is an insertion indicator.
'empty' says to hollow out the word (remove centre letters).
'with deep' becomes 'low' (similar in meaning. I am not sure about the 'with' bit.).
'brothel' with its centre removed is 'bl'.
'e' placed within 'bl' is 'bel'.
'bel'+'low'='BELLOW'
Can you help me to learn more?
(Other definitions for bellow that I've seen before include "Loud cry of a bull" , "Loud and deep roar" , "Yell" , "Roar loudly" , "Roar like a bull" .)