What is the meaning of ɋ?

the forward release of a bilabial click; superseded by IPA ʘ.

the tenuis velar or sometimes uvular bilabial click, [k͜ʘ] or [q͜ʘ]

The voiced stop /ɡ͡b/. Cf. regular q, which transcribes /k͡p/.

Source: wiktionary.org