Cooked doughnuts contain a tuber (4)

I believe the answer is:

eddo

'a tuber' is the definition.
(I've seen this before)

'cooked doughnuts contain' is the wordplay.
'contain' indicates a hidden word (words from the clue contain the answer).
'EDDO' is hidden in the letters of 'cooked doughnuts'.

(Other definitions for eddo that I've seen before include "edible root" , "Edible plant" , "exotic vegetable" , "taro tuber" , "Tropical plant" .)

I've seen this clue in the Sydney Morning Herald.

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