Twangy, as a voice (5)
I believe the answer is:
nasal
'twangy as a voice' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nasal that I've seen before include "Nosey" , "of central feature" , "like the sound from an organ" , "Hooters" , "front piece of helmet" .)