Tinny-sounding (8)
I believe the answer is:
metallic
'tinny-sounding' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for metallic that I've seen before include "sound of a bell?" , "Relating to shiny chemical element" , "Characteristic of a shiny solid element" , "Relating to a lustrous elementary substance" , "Like good conductor" .)