Conform the clothing to "Universe," and it will go back to its unconformed state.

Conforming clothing doesn't work perfectly, especially if your character is morphed. If you can, turn the body parts that are poking through invisible. Or use dynamic clothing.

For adjusting conforming clothing, it's generally best to conform it first, then tweak it. (With magnets, if necessary.) Once you conform it, any adjustments you have made will be lost.