Logically there can be no explanation because there is no first cause. There is only a first thing and it is uncaused. That is the point of the proof.
But there can be an explanation; for example "The first cause has no prior cause." would be an explanation. "It is turtles all the way down." is an explanation. "Brahma slept and dreamed." is an explanation.
Anyone so limited that they can only spell a word one way is severely handicapped!