The phrase "special aptitude" refers to a specific talent or skill that someone possesses. It means being naturally good or capable in a particular area. Full definition
Opening the evening, family friend Assemblyman Luis R. Sepulveda highlighted Ms. Rodriguez's perseverance and special aptitude for her new position. (thebronxchronicle.com)
A «talent» was equivalent to about $ 1000, and our modern use of the word to mean a special aptitude or gift is probably derived from this story. (religion-online.org)
All students participate in all basic subjects regardless of their special aptitudes. (pineforestschool.org)