Range and backing content of one voice (4)
I believe the answer is:
oven
'range' is the definition.
(I've seen this before)
'backing content of one voice' is the wordplay.
'backing' says the letters should be written backwards.
'content of' indicates a hidden word.
'nevo' is hidden within 'one voice'.
'nevo' reversed gives 'OVEN'.
'and' is the link.
(Other definitions for oven that I've seen before include "Kitchen appliance" , "Enclosed chamber for cooking" , "Hot spot" , "Metal box in which to roast" , "Small furnace" .)