The largest continent (4)
I believe the answer is:
asia
'the largest continent' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for asia that I've seen before include "huge territory" , "Continent of the Hindu Kush" , "It has most of the earth's population" , "Tigers found here" , "Continent bordering three oceans" .)