The most common and most likely answer to this crossword clue is the 7 letter word CARAWAY
C
A
R
A
W
A
Y
More clues leading to the result CARAWAY
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 = caraway.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 CARAWAY mean?
CARAWAY noun- A biennial plant, Carum carvi, native to Europe and Asia, mainly grown for its seed to be used as a culinary spice.
- The seed-like fruit of the caraway plant.
- A cake or sweetmeat containing caraway seeds.