The company offered little 'by way of explanation' for the delays. [=as a way of explaining why there were delays]
Some of the more technical terms need/require 'explanation'. [=they need to be explained]
a likely/probable/possible/plausible 'explanation of' how the accident occurred
(..) and you can stay with us. - It would be great! - Yes. Annie, will you pass me holds for the gift from Mason? - Here, honey. - Need a little explanation. Open it. I call it "The disk black Beatles ". #As it is ... Best of John, George, (..)2014 Boyhood