Jeezy is talking about how much he pays for a pound of cocaine. Paying less is a status symbol; it means he's farther up the drug ladder. He used to pay 24 (Kobe Bryant's jersey #) and now he pays 23 (LeBron James). Compare to JayZ in Empire State.
Dre is about to sing his verse; he is being called to the mic. Creeping is also driving and a phantom is a type of rolls-royce, so his flow or style of rap is smooth like a ride in an quality vehicle. "approach in a smooth, ghostlike manner"
referring to the previous line, hes comparing his clique(crew) to be as big as the crips( a large gang networked over the us),walking has a double meaning, crip walk (dance), and literally walking