Language really applied to African country (6)
I believe the answer is:
somali
'language' is the definition.
(Somali is an example)
'really applied to african country' is the wordplay.
'really' becomes 'so' (both can mean 'extremely').
'applied to' means one lot of letters go next to another.
'african country' becomes 'mali' (country in Africa).
'so'+'mali'='SOMALI'
(Other definitions for somali that I've seen before include "African language" , "1 [GCSE]" , "East African national" , "So Liam could be a man from NE Africa" , "From a part of northeast Africa" .)