It may still be the bearing. The design of the bearings used on the NSX are such that they can be very noisy and still not be able to detect any play in them as you can with more common types (ask me how I know). However, the "clunk" part is more suggestive of a half-shaft joint than a wheel bearing. Does it clunk when you first let out the clutch from a stop? You can also test this by jacking up that corner with it in neutral, then grab the wheel/tire on opposite sides and rapidly rotate it one way then the other. If a joint is real sloppy you will hear and feel it clunk.
When my bearing was bad it growled pretty bad. I pulled the wheel and brakes then rotated the hub. I could tell that something was notchy but I wasn't positive that it was the bearing until I removed the hub and turned it with nothing else attached.
It could of course be both, especially if that corner caught a curb or something. If it is a wheel bearing, find a shop that has done them or has much patience. Getting the hub off is no big thing, but getting the inner race out of the hub is a major SOB without exactly the right puller. (the manual refers to an unspecific commercially available puller. Perhaps, but it better be exactly the right commercially available puller!) I used a cutting wheel to create shoulders on either side of the race so I could grab it with a puller. And you need a decent press with the right adapters to press the new one back on.
