Artless young woman is remarkably genuine (7)
I believe the answer is:
ingenue
'artless young woman' is the definition.
(I've seen this before)
'remarkably genuine' is the wordplay.
'remarkably' indicates an anagram (I've seen this in other clues).
'genuine' with letters rearranged gives 'INGENUE'.
'is' is the link.
(Other definitions for ingenue that I've seen before include "Naive female" , "Naive young woman" , "Genuine (anag.)" , "Artless innocent young girl on stage" , "Innocent young woman in play" .)