Good to avoid excessive clamour (3)
I believe the answer is:
hue
'good' is the definition.
The definition and answer can be both human attributes as well as being singular nouns.
Maybe there's a link between them I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for hue that I've seen before include "complexion" , "Shade, aspect; Vietnam port" , "Shade of colour; Vietnam port" , "appearance" , "General outburst of alarm or protest - . . . and cry" .)