Notes train runs, producing lots of noise (10)
I believe the answer is:
stentorian
'producing lots of noise' is the definition.
I can't judge whether this definition defines the answer.
'notes train runs' is the wordplay.
'runs' indicates an anagram.
'notes'+'train'='notestrain'
'notestrain' is an anagram of 'STENTORIAN'.
Can you help me to learn more?
(Other definitions for stentorian that I've seen before include "booming" , "(Of a person's voice) loud and powerful" , "Strident" .)