The phrase "about how to defuse" is correct and usable in written English.
It can be used when discussing methods or strategies for calming a situation or resolving a conflict.
Example: "The workshop will focus on techniques about how to defuse tense situations in the workplace."
Alternatives: "regarding how to calm" or "concerning how to resolve".
Rather than constructing a bomb, I hope the book is about how to defuse it.
President Kabila has, however, begun to talk with Presidents Paul Kagame of Rwanda and Pierre Buyoya of Burundi about how to defuse these tensions.
In Washington, President Barack Obama and Congress are engaged in high-drama brinksmanship, like members of an ordnance-disposal unit arguing about how to defuse a huge ticking bomb.
Mr. Barroso appeared to be emboldened by the success of the Portuguese debt sale, which allowed him the political space to go on the offensive about the fund after weeks of private discussions about how to defuse the crisis.
On Friday, the Dalai Lama, speaking in India, made his most extended comments on the violence, accusing China's state-run media of trying to "sow the seeds of racial tension" there but calling for "meaningful dialogue" with Beijing about how to defuse tensions.
But they activate fears by association that are worth thinking far more seriously about how to defuse.
Romney never did figure out how to defuse widespread unease about his religion (a non-Christian cult to many Evangelicals), his vast wealth at a time of economic hardship, and the centrist, technocratic policies he pursued as governor of one of the bluest states.
Graham Allison joins many others in presenting them as "a guide for how to defuse conflicts, manage great-power relationships, and make sound decisions about foreign policy in general".
Just 10 percent had received training in how to defuse potentially violent situations involving the mentally ill.
From how and where a defensive lineman sets up, Campbell has a sense of how to defuse him.
