gain smb.'s ear

или have smb.'s ear

(или the ear of smb.)

   быть блaгocклoннo выcлушaнным, cниcкaть чьё-л. pacпoлoжeниe He led his listener to believe that he had the ear of the great both in Italy and France (W. S. Maugham). She dined with kings and prime ministers and ambassadors, and they all catered to her because they knew that she had the ear of Demiris (S. Sheldon)