Echo again to the noise of (7)
I believe the answer is:
'echo' is the definition.
(I've seen this before)
'again to the noise of' is the wordplay.
I cannot quite see how this works, but
'again' could be 're' (prefix meaning 'again') and 're' is found in the answer.
'noise' could be 'sound' (I've seen this in another clue) and 'sound' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for resound that I've seen before include "Reverberate" , "ring" , "Echo" .)