The correct spelling of the phrase "art a client" is /ɑːt ə ˈklaɪənt/. The first word, "art," is pronounced with a long 'a' sound as in "car." The second word, "a," is pronounced with a schwa sound, which is the sound in "uh." The final word, "client," is pronounced with the stress on the second syllable and the 'i' is pronounced with a long 'i' sound as in "eye." This phrase is commonly used in business to refer to the process of acquiring or attracting new clients.