Chrome or silver (5)
I believe the answer is:
metal
This clue is a double definition.
'chrome' is the first definition.
(thesaurus)
'silver' is the second definition.
(I've seen this in another clue)
(Other definitions for metal that I've seen before include "Musically it can be heavy" , "Zirconium, for example" , "Broken stone used in road-making" , "Copper or silver, say" , "Tin, for example" .)