Foil metal (3)
I believe the answer is:
tin
'foil metal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tin that I've seen before include "Silver-white metal, used to make cans" , "Atomic number 50" , "Element, symbol Sn" , "loaf of bread" , "Silvery-white metallic element" .)