Blooming disheartening final test (6)
I believe the answer is:
floral
'blooming' is the definition.
(with flowers)
'disheartening final test' is the wordplay.
'disheartening' suggests removing the centre.
'test' becomes 'oral' (oral is a type of examination).
'final' with its centre removed is 'fl'.
'fl'+'oral'='FLORAL'
(Other definitions for floral that I've seen before include "Decorated with flowers" , "Blooming" , "To do with flowers, perhaps an arrangement" , "Of flowers, like wreath" , "bouquet" .)