Note: Not sure where this gear-practice location really belongs on Mountain Project, if at all. There will probably never be any routes or bouldering problems listed. That is, it falls quite a bit short of what most think of as a crag. Feel free to suggest another locale for this!
This is a great place for gear-anchor practice: numerous cracks 1/8 inch to 6 inch at ground level or accessible via easy scrambling, all within a short hike from the city. An aspiring leader could be kept busy making placements and building anchors for hours without repeat. There is enough terrain to keep a handful of folks concurrently practicing the craft.
Some of the rock is pretty fractured, some bomber, and some inbetween ... plenty of opportunities to point out the issues to a beginning leader. It faces west for nice summer AM shade and winter sun in the PM.
Stuck Nut Crag is not far from the White Wash Area that lies up above the east ends of Candelaria and Menaul. See the series of photos and their captions for directions.