Refined English member with a set of books (7)
I believe the answer is:
elegant
'refined' is the definition.
(I know that refined can be written as elegant)
'english member with a set of books' is the wordplay.
'english' becomes 'E' (abbreviation as in OED).
'member' becomes 'leg' (member can mean a limb).
'with' means one lot of letters go next to another.
'set of books' becomes 'NT' (New Testament).
'e'+'leg'+'a'+'nt'='ELEGANT'
(Other definitions for elegant that I've seen before include "Well-dressed" , "Well-turned" , "A gentle way to be stylish" , "Cleverly simple" , "Fine" .)