Garments Carthaginian leader introduced to African city (6)
I believe the answer is:
Here is my best explanation:
'garments' is the definition.
(tunic is a kind of garment)
'carthaginian leader introduced to african city' is the wordplay.
'leader' indicates taking the first letters.
'introduced to' indicates putting letters inside.
'african city' becomes 'tunis' (I've seen this before**).
The first letter of 'carthaginian' is 'c'.
'c' going within 'tunis' is 'TUNICS'.
(Other definitions for tunics that I've seen before include "'Belted jackets, parts of uniforms (6)'", "Parts of uniforms of school or military", "Military jackets" and "Uniform jackets".)