strong suit
US /ˈstrɔŋ suːt/
UK /ˈstrɔŋ suːt/

1.
keahlian, kekuatan
a particular aptitude or talent; a strength
:
•
Public speaking is not my strong suit.
Berbicara di depan umum bukanlah keahlian saya.
•
Math has always been his strong suit.
Matematika selalu menjadi keahliannya.