depends on what you want out of clever girl.
its a low juggle, but you have MANY options off of it.
basically boils down to this
Flipout with st LK
Juggle with st.MK
HKD with cr.HK
many things off this, you can throw/hit (use stMK for the positive frame adv) mixup, or cancel the stLK to predator stance for a high/low, or cancel into tail flip if you really want to take that risk for the left right, Remember they wont always try to block so be wary of reversals.
you can juggle with other buttons, but Mediums are the best since the opponent will probably be guessing light/heavy for Flipout/HKD. After the juggle manual you can do another Clever Girl (if KV allows) or a blowout after a bounce with gives you not as much time as a HKD, but enough for a single mortar. With meter you can use Shadow Clever Girl to sneak some dmg after the manual if you need it.
if you want a side switch, you can get a Survival run HK after a HP Clever Girl if you really need but its really breakable to watch out.
Hard Knockdown (HKD):
the Sweep can be a little hard to time on some characters, but getting the hit means you can get a flame carpet off easy.
so you have options, you just gotta find what you want to do