noun / adjective
specialty
SPESH-uhl-tee/ˈspeʃəlti/
A particular field of concentrated expertise.
The pastry chef's specialty is decorating cakes with expert precision.

Etymology
A specialty was a particular or distinctive quality before it became a specialized branch of learning. The same idea of distinctiveness also underlies a characteristic product or something someone particularly focuses on.
In context
people come to me because their things have been stolen and i am set to find them more importantly sometimes those cases become magical in nature and that is my specialty
More examples
- Pediatrics and cardiology are two medical specialties.
- Fresh peach pie is the diner's specialty.
- The repair shop orders specialty tools for delicate watch repairs.
Forms
specialty · specialties
specialist noun — Someone with expertise in a particular field.
specialization noun — Concentration on a particular field or activity.