Money gets sword in silvery metal material (7)
I believe the answer is:
tinfoil
'silvery metal material' is the definition.
(tinfoil is silvery)
'money gets sword' is the wordplay.
'money' becomes 'tin' (old-fashioned slang term for money).
'gets' is a charade indicator (letters next to each other).
'sword' becomes 'foil' (foil is a kind of sword).
'tin'+'foil'='TINFOIL'
'in' is the link.
(Other definitions for tinfoil that I've seen before include "Thin metallic sheets for protecting food" , "Shiny food wrapping" , "Fine metal" , "Thin metallic sheet" , "Food wrapper" .)