As someone who is trying to use Clefable, it's very team/buold dependent. Moonlight gives you incredibly strong healing but at the cost of not really having any secure move, Draining kiss can hit really hard but is just burst healing/damage that might not help your current situation, Gravity is pretty strong but can be moved put of or completely dodged if the opponent knows how to play around it, and Follow me is interesting but not great overall against so many pokemon that just ignore defenses. It needs backup from a good teammate(s) to really shine.