I assume the phrase "spoke in the works" comes from the notion that inserting a spoke into a finely running machine will likely stop it working.
However, without all the spokes in a bicycle wheel, that wheel is susceptible to warping and other damage. So, when I lost / broke / sheared / snapped a spoke in my front wheel when on a short ride with Hannah during the week it was the lack of a spoke that was my "spoke in the works".
My riding in May has been less than I would have liked this year. I am hoping to ride Sunday but the weather forecast is doubtful.
Here's to no more spokes in the works.