strong suit

something for which a person shows a special talent languages are definitely the diplomat's strong suit Synonyms long suit, métier (also metier), speciality, specialty, forte, thingRelated Words area, arena, bailiwick, business, circle, demesne, department, discipline, domain, fief, fiefdom, field, line, precinct, province, realm, sphere, terrain; element; aptitude, aptness, bent, faculty, flair, genius, gift, knack, talent; pursuit, racket, vocation; inclination, leaning, partiality, penchant, predilection, predisposition, proclivity, propensity, tendency