Book raved about a vegetable (4)

I believe the answer is:

okra

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

'book raved about' is the wordplay.
'about' indicates the answer is hidden within the clue (the clue goes around or about the answer).
'OKRA' is hidden within 'book raved'.

(Other definitions for okra that I've seen before include "vegetable dish" , "Ladies' fingers with edible pods" , "Lady's fingers; gumbo; bhindi" , "old ladies' fingers" , "Edible seed pods" .)

I've seen this clue in The Mirror.

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