It is questionable if clarity can be achieved alone.
It depends on what clarity must do.
It depends on how whatever needs to be clear is to be understood.
It depends on what the other sees differently than you, and vice versa.
It depends on how you come to understand what they understand.
Words may be clear, and the meaning might be shared, but that still doesn’t mean that the logic is shared, or that the application of the meaning is shared.
When different types of expertise meet one another, people will use a different language and have a different perspective on the same task.
They need to find a way to see enough of what the other sees to be able to ask the right questions. These questions serve the purpose of discovering what the other may not yet know or what one might see differently than the other without knowing it.