The most common and most likely answer to this crossword clue is the 10 plus 1 letter word NOSTALGIA} –
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Buddy explains!
The straight part
We know that "sentimentality" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sentimentality = nostalgia} –.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 NOSTALGIA} – mean?
NOSTALGIA} – noun- A longing for home or familiar surroundings; homesickness.
- A bittersweet yearning for the things of the past.
- Reminiscence of the speaker's childhood or younger years.