Ringing concerning (5)
I believe the answer is:
about
This might be a double definition.
'ringing' is the first definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?
'concerning' is the second definition.
(about can mean concerning or relating to)
Can you help me to learn more?
(Other definitions for about that I've seen before include "Concerning (something)" , "Encompassing" , "Moving" , "Circa" , "In conection with, all around" .)