The most common and most likely answer to this crossword clue is the 6 letter word ANNULI
I've seen this crossword clue in Independent
A
N
N
U
L
I
More clues leading to the result ANNULI
- To cancel, one rings
- Retract one’s rings?
- Members of council unnaturally retiring around these parts
- Doughnuts to get rid of before lunchtime?
- Rings one’s seen beyond void
- Abolish international rings
- . Growth rings will invalidate one
- . Circular entities left out in a null set
- Rings to cancel bid barring outsiders
- Rings one set aside at the beginning
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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 ANNULI mean?
ANNULI noun- A ring- or donut-shaped area or structure.
- The region in a plane between two concentric circles of different radii.
- Any topological space homeomorphic to the region in a plane between two concentric circles of different radius.
- The ring of the sun not covered by the moon in an annular solar eclipse.
- Structure in a fern that consists of differentially thick-walled cells on a sporangium that bend and distort as a result of drying.
- The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom.
- (oil and gas production) The space contained between the centre well bore and any external tubing. Sometimes used for separated gas flow.