The most common and most likely answer to this crossword clue is the 8 letter word HAREBELL
H
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B
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L
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More clues leading to the result HAREBELL
- Plant a herb around spring, not start of winter
- Flowering plant’s on stand in lobby
- Prince sheltering insurrectionary flower
- Spring flower Spooner calls unadorned misery
- Renegade caught by Henry makes a bloomer
- Flower in bunch a rebel leader distributed
- Insurgent penetrates renowned computer plant
- One to blossom as dissenter imprisoned by bullying prince
- Corrected her label for the flowering plant
- 2001 computer lies about revolutionary flower
Buddy explains!

The straight part
We know that "flower" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case flower = harebell.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 HAREBELL mean?
HAREBELL noun- A perennial flowering plant, Campanula rotundifolia, native to the Northern Hemisphere, with blue, bell-like flowers.