Units deployed in an African capital (5)
I believe the answer is:
tunis
'an african capital' is the definition.
(capital of Tunisia)
'units deployed' is the wordplay.
'deployed' indicates an anagram.
'units' anagrammed gives 'TUNIS'.
'in' is the link.
(Other definitions for tunis that I've seen before include "North African city" , "N African port" , "Tom, Dick or Harry" , "North African port and capital" , "Capital of a republic in north Africa" .)