The most common and most likely answer to this crossword clue is the 8 letter word GERANIUM
I've seen this crossword clue in The Daily Telegraph
G
E
R
A
N
I
U
M
More clues leading to the result GERANIUM
- Sticky stuff covering poor Arnie's flower
- Plant eucalyptus maybe around key managed island
- Millions lost by metal plant
- Bloomer that may come to ruin game
- Good manure spread around 1
- Flower out of range, awkwardly, which I will go after with hesitation
- Asian queen cutting plant or flower
- A bloomer to stick around Eastern princess
- Plant producing metalloid element — a thousand laid off
- East Indian queen cutting sucker on climbing plant
Buddy explains!

The straight part
We know that "A bloomer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a bloomer = geranium.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does GERANIUM mean?
GERANIUM noun- Any flowering plant of the genus Geranium, the cranesbills, of family Geraniaceae.
- The common name for flowering plants of the genus Pelargonium.
- A bright red color tinted with orange, like that of a scarlet geranium.
- Of a bright red color tinted with orange, like that of a scarlet geranium.