Crossword Genius

Circular coral reef (5)

Ross

I believe the answer is:

atoll

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">circular coral reef</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for atoll that I've seen before include "tropical paradise?" , "tropical island" , "Bikini, perhaps" , "Coral isle" , "Ring-shaped coral reef enclosing a lagoon" .)

I've seen this clue in The Mirror, The Times, the Evening Standard and The Telegraph.
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