Black and silver pouch (3)
I believe the answer is:
bag
'pouch' is the definition.
(a pouch is a small bag)
'black and silver' is the wordplay.
'black' becomes 'b' (as in pencil classifications).
'and' says to put 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 "Claim" , "Secure" , "The amount of game shot by sportsman" , "Carrier" , "Item of luggage; catch and kill (an animal)" .)