Radiator hose leak issue

Had a radiator leak and it appeared to be the lower radiator hose. So I replaced the hose and installed new clamps as well. It still leaks though... I have tightened the clamp as tight as I can get it and it is still leaking (appears to be from the hose, where the hose connects to the water pump). The strange part is, it only leaks when cooled down. When I drive it, it doesn't leak. Park it in the garage and watch it for 15 minutes, nothing. Go out in the garage in the morning, huge puddle. Not sure what else to do. 97 TJ, 4.0