Diana Tennis says manslaughter is one of the simplest laws there is, so if they want clarification of it it sounds to her like there's one or two jurors stuck on manslaughter, the point of the question is to jolt that one (or two) out of her stuckness.
The manslaughter instruction in this case is more complex that just the two elements that make manslaughter, and includes language about when the killing of another human being is excusable.
Proposed answer "The court cannot engage in general discussion, but may be able to address a specific question ... if you have a specific question, please submit."
Nelson tells the court that the jury has ordered dinner, and counsel may take an hour for dinner, but starting 15 minutes from now (in case the jury comes right back with a specific question)