The most common and most likely answer to this crossword clue is the 8 letter word PRIMROSE
I've seen this crossword clue in Financial Times
P
R
I
M
R
O
S
E
More clues leading to the result PRIMROSE
- Written work about border plant
- Flower, grey lines perhaps round the edge
- Flower in formal lines, we hear
- Flower sprang up by soft verge
- Basic writing pens bound to be yellow
- Sort of writing about border flower
- A girl having the edge in writing?
- Writing about border in bloom
- Yellow flower border in everyday language
- Pale yellow wine that’s proper going to head
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 = primrose.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 PRIMROSE mean?
PRIMROSE noun- A flowering plant of the genus Primula.
- A plant of the family Primulaceae.
- A plant of the genus Oenothera, better known as an evening primrose.
- A flower of a primrose plant.
- A light yellow colour.
- To pick primroses.
- Of a light yellow colour.