Energetic kind of voice (6)
I believe the answer is:
active
This clue is a double definition.
'energetic' is the first definition.
('active' is associated in meaning with 'energetic')
'kind of voice' is the second definition.
(I've seen this before)
(Other definitions for active that I've seen before include "erupting periodically" , "Moving, doing things" , "Busy, not idle" , "Engaged, not idle" , "Moving about, functioning" .)