It would be really helpful to know what the stain is. Is it a pink colored alcohol like from a cosmo or a red wine stain that turned pink because you tried to clean it/dilute it at the time? Have you already made attempts at cleaning it and are still left with a lighter stain?
If it's dry clean only don't do anything and get it to the cleaners. Pretreatment can cause irreversible damage and the dry cleaner may not be able to get it out.
Spray and Wash Dual power has had great reviews too.
Hydrogen peroxide mixed with a tiny bit of detergent may also work.
