Ex-PM, having been given a roasting? (5)

I believe the answer is:

brown

I believe this is a double definition.

'ex-pm' is the first definition.
(former UK PM Gordon Brown)

'having been given a roasting?' is the second definition.
(as in food which has been browned)

(Other definitions for brown that I've seen before include "Chocolate, perhaps" , "Four-point ball" , "bookish father" , "Shade" , "Kind of sweetener" .)

I've seen this clue in The Guardian.

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