The most common and most likely answer to this crossword clue is the 7 letter word CATMINT
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More clues leading to the result CATMINT
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 = catmint.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 CATMINT mean?
CATMINT noun- Any of the about 250 species of flowering plant of the genus Nepeta, family Lamiaceae, certain of which are said to have medicinal qualities.
- Something that causes excitement or interest.