Definitely check all the swaybar and other linkages first to make sure they are tight. Anything that has a bushing, spray silicone lube on it. (DO NOT use wd-40 or oil-based lubricants.)
If you have a 4WD, the most likely cause is a CV joint. They usually click, but they can clunk. It could also be a tie rod end, various bushings, a front swaybar mount (if equipped), and more.