The most common and most likely answer to this crossword clue is the 8 letter word TARRAGON
I've seen this crossword clue in The Daily Telegraph
T
A
R
R
A
G
O
N
More clues leading to the result TARRAGON
- Flavouring rib and leg with salt
- Terribly arrogant cook might use this
- Herb, sailor with tatty cloth on
- Herb Alpert ultimately right to visit part of Spain
- Egypt’s last king inspired by old queen’s home cooking ingredient
- Herb grown by arrogant cook
- Herb found in most of Spanish region
- Arrogant cook employed in the kitchen
- Herb tapenade originally a Spanish region’s recipe
- Herb is frightfully arrogant
Buddy explains!

The straight part
We know that "seasoning" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case seasoning = tarragon.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 TARRAGON mean?
TARRAGON noun- A perennial herb, the wormwood species Artemisia dracunculus, from Europe and parts of Asia.
- The leaves of this plant (either fresh, or preserved in vinegar / oil mixture) used as a seasoning.