Blair is running a foreign capital (8)
I believe the answer is:
brasilia
'foreign capital' is the definition.
'Brasilia' can be an answer for 'capital' (capital of Brazil). I'm not sure about the 'foreign' bit.
'blair is running a' is the wordplay.
'running' is an anagram indicator (the letters run around to different places).
'blair'+'is'='blairis'
'blairis' anagrammed gives 'brasili'.
'brasili'+'a'='BRASILIA'
Can you help me to learn more?
(Other definitions for brasilia that I've seen before include "Capital city of Brazil" , "11 [CAPITAL]" , "South American capital" , "SA capital" .)