If we have to be more specific, we could say, “that we invite a Law Clerk of the House to provide an in camera briefing”.
What I'm wary of from past practice is that the law clerk is very.... If we bring the law clerk before us, where we can ask a whole bunch of partisan questions, we may not get the answers we want, because the law clerk will be very constrained. If we invite the law clerk to provide us with a briefing on the roles of cabinet confidences, to give us a separate briefing, which would be in camera, he or she may feel more inclined to provide us with perspective, and we're not putting the law clerk on the spot.