Huge echoing (10)
I believe the answer is:
resounding
This could be a double definition.
'huge' is the first definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I can't see?
'echoing' is the second definition.
('resound' can be a synonym of 'echo')
Can you help me to learn more?
(Other definitions for resounding that I've seen before include "Booming" , "Decisive" .)