Crossword Genius

As you can see it forms a ring (5)

Ross

I believe the answer is:

atoll

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'as you can see it' is the definition.
I can't judge whether this definition defines the answer.

'a ring' is the wordplay.
'ring' becomes 'toll' (a bell tolls).
'a'+'toll'='ATOLL'

'forms' acts as a link.

Can you help me to learn more?

(Other definitions for atoll that I've seen before include "tropical paradise?" , "Bikini for one" , "Bikini, perhaps" , "Coral island surrounding a lagoon" , "Ring of coral" .)

I've seen this clue in The Globe and Mail.
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