Sounds a lot like what I remember from my youth at either the Sears or Carson's candy counters as Pecan Glaze. There's less 'brittle', and it's a darker, more caramel-tasting glaze, with roasted-flavored nuts -- a huge improvement over peanut brittle.
On a related note, years ago I made General Tso's chicken and had a lot of glaze left from that, and used it to make peanut brittle which was awesome. The orange and chile were terrific with the salt and sweet. I tried to replicate it later and did not succeed.