Loud metallic sound (5)
I believe the answer is:
clang
'loud metallic sound' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for clang that I've seen before include "Loud resonant metallic sound" , "Dull sound of a bell" , "Metallic ring" , "Noise as of cymbals" , "Resounding effect" .)