specialty
US /ˈspeʃ.əl.ti/
UK /ˈspeʃ.əl.ti/

1.
a pursuit, area of study, or skill to which someone has devoted much time and effort and in which they are expert
:
•
Her specialty is pediatric cardiology.
•
This restaurant's specialty is seafood.
2.
a product for which a person or place is famous
:
•
Local cheese is a regional specialty.
•
The bakery's specialty is its sourdough bread.