Is the hole stripped? If it is I would use a toothpick and some titebond or gorilla wood glue to tighten the hole back up. An alternative would be to drill out the hole then glue in a dowel to hold a new hole for the insert.
If the hole is not stripped I would try a drop of superglue on the outside threads. I think that might be enough to keep it in place as long as you do not over tighten the screw. This method should also allow you to break the bond should you ever need to remove the insert.
The only other thing I can think of is drop of epoxy on the outside threads but this would be permanent.
