Black and silver item of luggage (3)
I believe the answer is:
bag
'item of luggage' is the definition.
(I've seen this before)
'black and silver' is the wordplay.
'black' becomes 'b' (as in pencil classifications).
'and' is a charade indicator (letters next to each other).
'silver' becomes 'ag' (Ag is the chemical symbol for silver).
'b'+'ag'='BAG'
(Other definitions for bag that I've seen before include "Quantity of game shot in a particular period" , "Secure" , "Carrier" , "Item of luggage; catch and kill (an animal)" , "interest" .)