Sad beautiful woman reportedly making a bloomer (8)
I believe the answer is:
bluebell
'a bloomer' is the definition.
(bluebell is a kind of flowering plant)
'sad beautiful woman reportedly' is the wordplay.
'sad' becomes 'blue' (similar in meaning).
'beautiful woman' becomes 'belle' (I've seen this in another clue).
'reportedly' indicates a 'sounds like' (homophone) clue.
'belle' sounds like 'bell'.
'blue'+'bell'='BLUEBELL'
'making' is the link.
(Other definitions for bluebell that I've seen before include "Wildflower" , "Wild flowers with bell-shaped heads" , "Scottish flower" , "Azure ringer for a flower" , "Spring woodland flower" .)