First blot the stain to remove as much red wine vinegar as possible. Then flood the area as soon as possible with water by blotting or by flushing the stain under running water. If stain remains, treat with an enzyme pre-soak product and launder as usual.
If the garment is dry clean only, point out and identify the stain to your professional cleaner. If you are using a home dry cleaning kit, be sure to treat the stain with the provided stain remover before putting the garment in the dryer bag.
Specific questions? Just ask here.