The most common and most likely answer to this crossword clue is the 5 letter word TULIP
I've seen this crossword clue in The Times
T
U
L
I
P
More clues leading to the result TULIP
- Plant that flowers, ending around the middle of July
- Dump outside entrances to urban lorry plant
- Trade union gets backchat in plant
- Flower heads in the undergrowth, lying in pieces
- Advice about extremely unusual flower
- Sheep swallowing half of lily flower
- Flower lit up rocks
- Advice about unusual case that appears in spring
- Some advice given about essentially peculiar flower
- Plant starts to unfurl lavishly in raised bed
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 = tulip.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 TULIP mean?
TULIP noun- A type of flowering plant, genus Tulipa.
- The flower of this plant.