I throw up going through country (7)
I believe the answer is:
bolivia
'country' is the definition.
(Bolivia is an example)
'i throw up going through' is the wordplay.
'throw' becomes 'lob' (to lob something is to chuck or throw it).
'up' says the letters should be written in reverse (in down clue: letters go upwards).
'going through' becomes 'via' (via means through).
'i'+'lob'='ilob'
'ilob' reversed gives 'boli'.
'boli'+'via'='BOLIVIA'
(Other definitions for bolivia that I've seen before include "Landlocked South American country" , "South American state" , "South American country, capital La Paz" , "South American nation" , "High S. Amer. country" .)