If dogbone then you will catch the clunk on and off power going straight ahead too.
Turning only at full lock says strut mount or balljoint. Sometimes you swear the joint is tight but you cannot replicate the exact forces on a ton and a half car with a crowbar. BTDT.
Not CV, if clunking there is no way you won't catch it going straight or close to straight too. The wear in CVs is mostly in the straight ahead position, once you vary from that even a little you would run into the clunk long before you get to full lock steering. In CV the clunk is the ball snapping from a worn slot to the relatively unused new part of slot towards the ends. There is an edge that develops there from two arguing slot patterns, the ball snaps across it. The edge should generally show around a half turn or so, not full lock only.