The most common and most likely answer to this crossword clue is the 7 letter word LUNULES
I've seen this crossword clue in Independent
L
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Buddy explains!
The straight part
We know that "small crescents" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case small crescents = lunules.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 LUNULES mean?
LUNULES noun- Anything crescent-shaped; a crescent-shaped part or mark; a lunula or lune.
- A special area in front of the beak of many bivalve shells, sometimes shaped like a double crescent, but more often heart-shaped.