Like one with a vast tract of land (4)
I believe the answer is:
asia
'land' is the definition.
(Asia is an example)
'like one with a' is the wordplay.
'like' becomes 'as'.
'one' becomes 'i' (Roman numeral).
'with' says to put letters next to each other.
'as'+'i'+'a'='ASIA'
'vast tract of' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for asia that I've seen before include "Heavily populated area" , "Major land mass" , "group of countries" , "Populous area" , "huge territory" .)