Twisted metal rods for painting (3,6)
I believe the answer is:
old master
'painting' is the definition.
(old master can mean a painting by an old master)
'twisted metal rods' is the wordplay.
'twisted' indicates anagramming the letters.
'metal'+'rods'='metalrods'
'metalrods' anagrammed gives 'OLD MASTER'.
'for' is the link.
(Other definitions for old master that I've seen before include "Costa?" , "Great Renaissance painter" , "Famous painting" , "Classic painting" , "Michelangelo perhaps" .)