The most common and most likely answer to this crossword clue is the 10 letter word MADELEINES
I've seen this crossword clue in The Sunday Telegraph
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More clues leading to the result MADELEINES
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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 MADELEINES mean?
MADELEINES noun- A French type of small gateau or sponge cake, often shaped like an elongated scallop shell.
- Something which brings back a memory; a source of nostalgia or evocative memories.