A bird burning nothing (8)
I believe the answer is:
flamingo
'a bird' is the definition.
(flamingo is a kind of bird)
'burning nothing' is the wordplay.
'burning' becomes 'flaming' (flaming is a kind of burning).
'nothing' becomes 'O' (looks like zero - 0).
'flaming'+'o'='FLAMINGO'
(Other definitions for flamingo that I've seen before include "Wading bird with pink and red plumage" , "Long-legged wader" , "Pink wader" , "Pretty bird" , "colourful bird" .)