Is around maybe but it disappeared ages ago (8)

I believe the answer is:

dinosaur

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'it disappeared ages ago' is the definition.
The definition suggests a singular noun which matches the answer.

'is around maybe' is the wordplay.
'maybe' indicates an anagram.
'is'+'around'='isaround'
'isaround' anagrammed gives 'DINOSAUR'.

'but' acts as a link.

Can you help me to learn more?

(Other definitions for dinosaur that I've seen before include "Extinct reptilian animals" , "Extinct repile" , "Extinct reptilian animal" , "Eg, triceratops" , "Out of date person or thing" .)

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

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