Nation featured in Kremlin Diaries (5)
I believe the answer is:
india
'nation' is the definition.
(India is an example)
'featured in kremlin diaries' is the wordplay.
'featured in' says the answer is hidden in the clue.
'INDIA' is hidden in the letters of 'kremlin diaries'.
(Other definitions for india that I've seen before include "Eastern country" , "vast country" , "Populous Asian country" , "Land in Asia" , "where to ring for help?" .)