The most common and most likely answer to this crossword clue is the 8 letter word AGRIMONY
I've seen this crossword clue in The Guardian
A
G
R
I
M
O
N
Y
More clues leading to the result AGRIMONY
- Lip in severe pain, bringing medicinal herb
- Income from farming, could one say, avoiding English perennial
- A ghastly start for one city plant!
- Plant suffering all round border
- Plant suffering around outermost part
- Herb providing revenue for the farmer, we hear?
- Herb from the border, cutting extreme pain
- Plant on a grimy ground
- Adult working in dirty church steeples?
Buddy explains!

The straight part
We know that "Herb" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case herb = agrimony.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 AGRIMONY mean?
AGRIMONY noun- Any of several perennial herbaceous plants, of the genus Agrimonia, that have spikes of yellow flowers.
- Any of several unrelated plants of a similar appearance.