Units destroyed in African capital (5)
I believe the answer is:
tunis
'african capital' is the definition.
(I've seen this before)
'units destroyed' is the wordplay.
'destroyed' indicates anagramming the letters.
'units' with letters rearranged gives 'TUNIS'.
'in' acts as a link.
(Other definitions for tunis that I've seen before include "Capital of a republic in north Africa" , "Mediterranean capital and port" , "N African port" , "North African location" , "North African city" .)