I always kind of chuckle at threads like this. OP you have a valid concern and exercise selection IS the remedy.
However you simply cannot target the area you speak of, or any other area of the chest. Instead what you must do is choose exercises that stimulate the pecs to the maximum.
IMO that would be dips, especially Gironda style, and decline bench press. I also really like the neck press with elbows flared but its not an exercise that allows much progression so I do not don't often.
Chest for most guys is also a muscle that can be trained twice a week. I would have you do 2 chest/back days each week a few days apart. Like say Monday and Thurs. You can do legs in the middle and end. Maybe throw an arm day in on Saturday, but you could also just throw some close grip bench in on one of the chest days and some barbell curls, db laterals or upright rows on another.