To discuss or otherwise confront a troublesome issue, usually with the goal of alleviating tension or confusion. The silent treatment isn't helping the situation between you two, so just clear the air already. Once we cleared the air, we found that it had just been a simple misunderstanding.

What's another way to say clear the air?

In this page you can discover 14 synonyms, antonyms, idiomatic expressions, and related words for clear-the-air, like: clarify, clear up, decipher, elucidate, explain, interpret, make clear, make plain, shed-light-on, solve and define.

Is it on air or on the air?

Thus "on the air" is the correct phrase.