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 judge whether this defines the answer.
'see durer possibly' is the wordplay.
'see' becomes 'c' (the word for the letter, according to Chambers**).
'possibly' indicates anagramming the letters.
'durer' with letters rearranged 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" .)