Black and silver container (3)
I believe the answer is:
bag
'container' is the definition.
(bag is a kind of container)
'black and silver' is the wordplay.
'black' becomes 'b' (as in pencil classifications).
'and' means one lot of letters go next to another.
'silver' becomes 'ag' (Ag is the chemical symbol for silver).
'b'+'ag'='BAG'
(Other definitions for bag that I've seen before include "Container for carrying thing" , "Piece of luggage" , "Item of luggage; catch and kill (an animal)" , "Valise" , "Claim" .)