Country appearing in certain diaries (5)
I believe the answer is:
india
'country' is the definition.
(I know that India is a country)
'in certain diaries' is the wordplay.
'in' indicates the answer is hidden within the clue.
'INDIA' is hidden within 'certain diaries'.
'appearing' acts as a link.
(Other definitions for india that I've seen before include "Subcontinent of Asia south of Himalayas" , "Commonwealth state" , "Second-most populous country" , "Big country" , "home to her Mumbai family" .)