Deliver burnt vegetable (5)
I believe the answer is:
chard
'vegetable' is the definition.
(I know that chard is a type of vegetable)
'deliver burnt' is the wordplay.
'deliver' indicates a 'sounds like' (homophone) clue (I've seen 'delivered' mean this (delivered verbally)).
'burnt' becomes 'charred' (char can mean to burn or blacken).
'charred' sounds like 'CHARD'.
(Other definitions for chard that I've seen before include "Variety of beet with edible leaves" , "Variety of beet with edible white leaf stalks" , "Type of beet" , "Beet with edible leaves and stalks" , "Vegetable with edible leaves and stalks" .)