A male crew in an Asian capital? (5)
I believe the answer is:
amman
'asian capital?' is the definition.
(capital of Jordan)
'a male crew in' is the wordplay.
'male' becomes 'm' (common abbreviation).
'crew' becomes 'man' (both can mean to staff or operate something).
'in' indicates putting letters inside.
'm' going into 'man' is 'mman'.
'a'+'mman'='AMMAN'
'an' acts as a link.
(Other definitions for amman that I've seen before include "Middle East capital" , "Jordanian capital" , "City of Jordan" , "Asian capital" , "Jordanian city" .)