In Dynasty, women’s nasal tones (5)
I believe the answer is:
twang
'nasal tones' is the definition.
(twang can mean a nasal quality in a voice)
'in dynasty women's' is the wordplay.
'in' is an insertion indicator.
'dynasty' becomes 'tang' (Chinese dynasty).
'women' becomes 'w' (standard abbreviation).
'tang' enclosing 'w' is 'TWANG'.
(Other definitions for twang that I've seen before include "Harsh sound of plucked string" , "Nasal tone or sound of plucked string" , "Nasal accent" , "Sharp vibrating sound" , "accent's nasal sound" .)