Relation of pleasant oriental content (5)
I believe the answer is:
niece
'relation' is the definition.
(I know that niece is a type of kinswoman)
'pleasant oriental content' is the wordplay.
'pleasant' becomes 'nice' (similar in meaning).
'oriental' becomes 'e'.
'content' is an insertion indicator (some letters act as content for another word).
'nice' placed around 'e' is 'NIECE'.
'of' acts as a link.
(Other definitions for niece that I've seen before include "Female relation" , "Brother or sister's daughter" , "Daughter of a sibling" , "Criminal" , "Female family member" .)