Note antique and valuable stuff (4)
I believe the answer is:
gold
'valuable stuff' is the definition.
(I know this)
'note antique' is the wordplay.
'note' becomes 'g' (musical note).
'antique' becomes 'old' (similar in meaning).
'g'+'old'='GOLD'
'and' is the link.
(Other definitions for gold that I've seen before include "Wealth; first prize" , "bull's-eye" , "Tokens of marriage" , "Thin sheet of precious metal" , "Mine produces this" .)