Some Christmas I appeared in the continent (4)
I believe the answer is:
asia
'continent' is the definition.
(Asia is an example)
'some christmas i appeared in' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'ASIA' can be found hidden inside 'christmas i appeared in'.
'the' acts as a link.
(Other definitions for asia that I've seen before include "Stretch of land" , "lands in the east" , "One-third of all land" , "Heavily populated area" , "Thailand and its location" .)