Reportedly blackened vegetable (5)

I believe the answer is:

chard

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'vegetable' is the definition.
(I know that Chard is a type of Leaf vegetable)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for chard that I've seen before include "Vegetable with edible leaves and stalks" , "salad" , "Leaf stalks from a kind of beet" , "Variety of beet with edible white leaf stalks" , "Green vegetable" .)

I've seen this clue in The Sun.

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