Shiny plating (6)
I believe the answer is:
chrome
'shiny plating' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for chrome that I've seen before include "Protective finish on motor vehicle fittings" , "Brilliant finish" , "Metal plating - type of yellow" , "Shiny metallic coating" , "Silvery metal surface to prevent tarnishing" .)