Restoring one application data from ClockModRecovery Backup
Yes, it is:


Titanium Backup can restore from nandroid backups (which is what CWM created)
AppExtractor can extract individual apps/data from Nandroid backups
Nandroid Browser lets you... guess what :)
and then there's Nandroid Manager to browse them, restore single items, etc.


Further readings:


the nandroid tag-wiki
Restore only part of nandroid image
Extract App Data from Nandroid / CWM Backup