The voiceless velar lateral affricate is a relatively uncommon speech sound found as a phoneme in the Caucasus and as an allophone in several languages of eastern and southern Africa.
In strict IPA, it needs to be transcribed with diacritics, but a proper letter exists in extIPA: ⟨k͜𝼄⟩.
Archi, a Northeast Caucasian language of Dagestan, has two such affricates, plain [k𝼄] and labialized [k𝼄ʷ], though they are further forward than velars in most languages, and might better be called prevelar.
Indeed, in Hadza this [k͜𝼄ʼ] contrasts with a palatal lateral ejective affricate, [c͜𝼆ʼ].
Shaded areas denote articulations judged impossible.