The most common and most likely answer to this crossword clue is the 10 letter word BREADSTICK
I've seen this crossword clue in Financial Times
B
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More clues leading to the result BREADSTICK
- Lolly: endlessly gooey snack item
- A long nibble on Rod’s lolly
- Grissino, say, with the necessary jam
- Bachelor scans second item from bakery
- Solid block stuffed with stewed dates, crisp food
- Tired backs ordered this with Italian meal
- Nans possibly approve of aperitif accompaniment
- Brass rod for dipping
- Good person ate cooked dates for appetizer
Buddy explains!

The straight part
We know that "Grissino, say" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case grissino, say = breadstick.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 BREADSTICK mean?
BREADSTICK noun- A long, very slender loaf of crisp bread smaller than a baguette; for example, grissini from Italy and rosquilletas from Spain.