Country diary's rebuffed cutting gossip (6)
I believe the answer is:
angola
'country' is the definition.
(I know that Angola is a African country)
'diary's rebuffed cutting gossip' is the wordplay.
'diary' becomes 'log' (log can mean a record or diary).
'rebuffed' is a reversal indicator.
'cutting' is an insertion indicator (some letters cut their way into a word).
'gossip' becomes 'ana' (I have seen 'literary gossip' mean 'ana' so perhaps 'gossip' could also mean 'ana').
'log' written backwards gives 'gol'.
'gol' placed within 'ana' is 'ANGOLA'.
(Other definitions for angola that I've seen before include "African country, former Portuguese colony" , "Country of SW Africa" , "West African country" , "It's no gala in this African country" , "SW African state" .)