Carry out purchase picked up in city (5)
I believe the answer is:
dubai
'city' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for dubai that I've seen before include "One of the UAE and its capital" , "Port city of UAE" , "Persian Gulf state" , "capital and port" , "Gulf sheikhdom" .)