How to fix leaking PVC fitting?
The hose clamp is right out.  All you'll do is crack something -- if you're lucky, right away.

Likewise trying to inject PVC cement (705) is not a good idea.  Even if you manage to plug the leaks, the majority of the joint is compromised.   It will eventually fail, and the law practically says it will fail 2 hours after you've left for a 2 week vacation, etc. (^_^)

PVC is super easy to repair or replace, and hacksaws are cheap too.  If it's a particularly difficult section of pipe, consider installing one or two unions, to make the repair easier.

Go ahead and rebuild that section properly.