a doctor whose 'specialty' [=('Brit') 'speciality'] is skin problems
Eggs are my dad's 'specialty'. [=('Brit') 'speciality']
Buttermilk pie is a Southern 'specialty'.
(..) - Yeah! - That's that, then. I mean, I was worried about mug shot possibility as it was. He knows A, your name, B, your face, C, your hometown and D, your specialty. They're not gonna have to show him a lot of pictures for him to pick you out! You didn't tell him anything else (..)1992 Reservoir Dogs