Strangely resonant — it is loud (10)
I believe the answer is:
stentorian
'loud' is the definition.
(similar in meaning)
'strangely resonant it' is the wordplay.
'strangely' indicates an anagram.
'resonant'+'it'='resonantit'
'resonantit' anagrammed gives 'STENTORIAN'.
'is' is the link.
(Other definitions for stentorian that I've seen before include "Strident" , "(Of a person's voice) loud and powerful" , "booming" .)