A bulk transport in Afghanistan (5)
I believe the answer is:
kabul
'in afghanistan' is the definition.
('Kabul' is part of 'afghanistan')
'a bulk transport' is the wordplay.
'transport' indicates anagramming the letters (I've seen 'transported' mean this).
'a'+'bulk'='abulk'
'abulk' is an anagram of 'KABUL'.
(Other definitions for kabul that I've seen before include "Afghan capital" , "city abroad" , "Afghan city" , "Middle Eastern capital" , "Capital city of Afghanistan" .)