Two articles about oddly slim landmass (4)
I believe the answer is:
asia
'landmass' is the definition.
(Asia is an example)
'two articles about oddly slim' is the wordplay.
'two articles' means two substitutions for 'article'.
'article' becomes 'a' (the indefinite article in English).
'article' becomes 'a' (the indefinite article in English).
'about' is a charade indicator (letters next to each other).
'oddly' means one should take alternating letters (letters in the odd-numbered positions are used).
The alternating letters of 'slim' are 'si'.
'a' after 'si' is 'sia'.
'a'+'sia'='ASIA'
(Other definitions for asia that I've seen before include "Thailand and its location" , "Stretch of land" , "huge territory" , "Continent in which India is situated" , "It has most of the earth's population" .)