I’m leaning towards needing a new axle, but if it is a single clunk each time, that would open a few more possibilities. Did the noise start only after the work on the left side? If so, did they replace the sway bar link on the left side when they did the strut? If so, then you would have a stiff, tight joint on the left side of the vehicle driving a potentially loose, sloppy joint on the right side via the sway bar, and so it could be a sway bar link or even a strut mount on the right side making the noise…