Like one with a large area of land (4)

I believe the answer is:

asia

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'land' is the definition.
(I know that Asia is a continent)

'like one with a' is the wordplay.
'like' becomes 'as'.
'one' becomes 'i' (Roman numeral).
'with' is a charade indicator (letters next to each other).
'as'+'i'+'a'='ASIA'

'large area of' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for asia that I've seen before include "Thailand and its location" , "A is A (anag)" , "Eastern continent" , "Populous area" , "Tigers found here" .)

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

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