It's possibly viable
Depending on how invested you are in clip-on's you could use standard cafe bike handlebars and mount them to your risers just like current handlebars are mounted. Back in the 80's we used to just flip handlebars over in many cases to turn our bikes into cafe style rides. This would obviously not work on your motorcycle because of the shape of your handlebars but you could procure some cafe style handlebars and attempt to use those.
Another possibility is to get clip-on handlebars and modify the mount that attaches to the fork in order to get the clearance required between the headlight mount and the fork. You could have the bracket machined to slip in there.
Some clip on manufacturers use double sided pinch components that do not require you to slide the fork out of the top triple clamp. Basically they are NOT clam-shell style and have the pinch bolts on either side of the bracket rather than on one side. Woodcraft comes to mind as a manufacturer that accommodates this configuration. Most racing clip-on's conform to this style as it is much quicker to replace broken clip-on's if you don't have to slide the fork down in the triple tree to mount them onto the bike.
Image of Woodcraft clip-on's
Notice how you can split the mount in two. As well, the Woodcraft have a very thin gap and may just slide between the headlight mount and the fork on your bike.
IMO you will want to find a way to mount clip-on's below the top triple clamp. This will be a much safer configuration. The last thing you need under heavy braking is the mount spinning on the fork creating a potentially unsafe situation for yourself. You will want the entire clip-on mount grabbing the fork to prevent slippage.