The phrase "and failed to explain" is correct and usable in written English.
It can be used to indicate that someone did not provide an explanation for something that was expected or required.
Example: "The report was incomplete, and failed to explain the reasons behind the project's delays."
Alternatives: "and did not clarify" or "and neglected to provide an explanation".
She lacked political charisma and failed to explain her views on important issues.
Amateur hour started when Obama dithered on Syria and failed to explain the stakes there.
Despite this, the government reiterated its refusal to name names and failed to explain how it squares this with the requirements of the code.The idea that the danger of lobbying is sufficient to justify anonymity is nonsense.
If you don't know what gamergate is, I'd suggest you Google it, because I've tried and failed to explain its roots in person to people I consider patient grownups, each of whom pulled a face like I was describing the plot of a terrible high-school teen drama.
He raised questions and never answered them, had his characters act in self-destructive ways and failed to explain why, and sometimes kept the camera rolling after a take in the hope of catching the actors in an unscripted but revealing moment.
It did a poorer job of mustering legislative support than the Republicans did, mishandled local politicians in New York, and failed to explain to members of the public, in a persuasive way, why going to court mattered should matter to them.
Again, he provides no source for this claim (and fails to explain where his original contentions came from), so it's not easy to address.
Despite polls suggesting a high popularity for such a system, the news media regurgitate myths and fail to explain the proposals of the health care debate.
If they despise their successor, departing bosses can block access to a firm's important clients, suppliers and investors, and fail to explain vital procedures.
But too often that analysis is imprecise and fails to explain or justify the value of obtaining DNA from someone before he is convicted.
Webster's calls music "the science or art of incorporating pleasing, expressive, or intelligible combinations of vocal or instrumental tones," which is pretty vague, and fails to explain Limp Bizkit.
