See Durer, possibly, as not so refined! (6)
I believe the answer is:
cruder
'see durer possibly as not so refined' is the definition.
I can't tell whether this definition defines the answer.
'see durer possibly' is the wordplay.
'see' becomes 'c' (the word for the letter, according to Chambers).
'possibly' indicates an anagram.
'durer' anagrammed gives 'ruder'.
'c'+'ruder'='CRUDER'
Can you help me to learn more?
(Other definitions for cruder that I've seen before include "Less refined, more vulgar" , "Less refined, more primitive" .)