Faint suggestion for audience becoming less loud (10)
I believe the answer is:
diminuendo
'loud' is the definition.
Both the answer and definition are adjectives. Perhaps you can see an association between them that I can't see?
'faint suggestion for audience becoming less' is the wordplay.
I cannot really see how this works, but
'faint' could be 'dim' ('dim' can be a synonym of 'faint') and 'dim' is located in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for diminuendo that I've seen before include "Getting quieter" , "becoming quieter" , "volume is to be cut" , "Making less sound" , "losing force" .)