Final cardiogram disguised bloomer (7,8)

I believe the answer is:

african marigold

'bloomer' is the definition.
(African marigold is an example)

'final cardiogram disguised' is the wordplay.
'disguised' indicates anagramming the letters.
'final'+'cardiogram'='finalcardiogram'
'finalcardiogram' anagrammed gives 'AFRICAN MARIGOLD'.

I've seen this clue in The Telegraph.

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