As you can see it forms a ring (5)
I believe the answer is:
atoll
'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" .)