African capital nearly caught unarmed outfit (5)
I believe the answer is:
tunic
'unarmed outfit' is the definition.
(type of garment without arms)
'african capital nearly caught' is the wordplay.
'african capital' becomes 'tunis' (I've seen this before).
'nearly' means to remove the last letter.
'caught' becomes 'c' (cricket abbreviation).
'tunis' with its final letter taken away is 'tuni'.
'tuni'+'c'='TUNIC'
(Other definitions for tunic that I've seen before include "Knee-length cloak" , "Policeman may be in one" , "Close fitting jacket as part of uniform" , "Shift" , "Smock" .)