Colour mixed by Dürer (4-3)
I believe the answer is:
ruby-red
'colour' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?
'mixed by durer' is the wordplay.
'mixed' is an anagram indicator.
'by'+'durer'='bydurer'
'bydurer' is an anagram of 'RUBY-RED'.
Can you help me to learn more?
(Other definitions for ruby-red that I've seen before include "Deep crimson" , "kind of lippy?" , "Gemstone colour" .)