The most common and most likely answer to this crossword clue is the 7 letter word OREGANO
I've seen this crossword clue in The Times
O
R
E
G
A
N
O
More clues leading to the result OREGANO
- Ducks stuffed by daughter ungrateful for herb
- Men concerned with later life backing part of Mediterranean diet?
- Ducks outside range freely, finding something smelling nice
- Seasoning duck with orange puree
- Lear's daughter in good heart leaves for season
- Newspaper, perhaps, wrapping store’s last old herb
- Plant publication about European duck
- Circles in which literary princess is offered culinary herb
- Herb’s ego jarred with Nora
- Sadly a goner, old Herb
Buddy explains!

The straight part
We know that "leaves for season" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case leaves for season = oregano.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 OREGANO mean?
OREGANO noun- A herb of the mint family, Origanum vulgare, having aromatic leaves.
- Other herbs with a similar flavor, including other species in the genus Origanum, and Mexican oregano, Lippia graveolens
- The leaves of these plants used in flavouring food.