There is no change set in Base ClearCase. It only exists (without counting UCM) in:
- Base ClearCase-ClearQuest (as mentioned in "About Rational ClearCase triggers, change sets, and request sets").
- Base ClearCase integrated with RTC
Using branches to report specific changes remain the best way to get back to a stable state.
With CCRC (or ClearTeam), you have the notion of pending changes, in order to define how you will apply your current changes (including the option to integrate said changes in a new branch).