The most common and most likely answer to this crossword clue is the 6 letter word DAHLIA
I've seen this crossword clue in The Times
D
A
H
L
I
A
More clues leading to the result DAHLIA
- Harpy's head covered by artist with a plant
- Roald recalled excellent flower
- Plant in trouble had backing
- Trouble had arisen, leading to bloomer
- Hibiscus originally captured by artist, a flowering plant
- Bloomer occurring more regularly, we hear
- Writer given one American plant
- Trouble had upset lovely thing in bed
- Trouble encountered turning round plant
- Painter captures hearts with a flower
Buddy explains!

The straight part
We know that "flowering plant" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case flowering plant = dahlia.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 DAHLIA mean?
DAHLIA noun- Any plant of the genus Dahlia, tuberous perennial flowering plants native to Mexico.