Reportedly burnt vegetable? (5)
I believe the answer is:
chard
'vegetable?' is the definition.
(chard is a kind of vegetable)
'reportedly burnt' is the wordplay.
'reportedly' indicates a 'sounds like' (homophone) clue.
'burnt' becomes 'charred' (char can mean to burn or blacken).
'charred' sounds like 'CHARD'.
(Other definitions for chard that I've seen before include "Kind of (Swiss?) beet with edible leaves" , "Green vegetable" , "vegetable crop" , "salad" , "Beet with edible leaves and stalks" .)