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
(..) there is no excuse. Despite repeatedly telling him about bringing carrots, onions and parsley for lunch. Everyday I write a message and ask for an explanation. And finally this is sent to me by the doctor. "Dear Comrade, whenever I read your lines, I have the wildest dreams (..)1989 Dva lidi v zoo