Remarkably ethnic, good work of art (7)
I believe the answer is:
etching
'work of art' is the definition.
(I've seen this before)
'remarkably ethnic good' is the wordplay.
'remarkably' is an anagram indicator (I've seen this in other clues).
'good' becomes 'g' (abbreviation).
'ethnic' with letters rearranged gives 'etchin'.
'etchin'+'g'='ETCHING'
(Other definitions for etching that I've seen before include "Drawing on metal with acid" , "Carving into a surface" , "Eating away; corroding" , "Engraving with acid" , "Print produced from engraving" .)