kamsarir api samsara-
radham adhaya hrdaye
kamsa-arih—Lord Krsna, the enemy of Kamsa; api—moreover; samsara—for the essence of enjoyment (rasa-lila); vasana—by the desire; baddha—tied on; srnkhalam—who was like the chains; radham—Srimati Radharani; adhaya—taking; hrdaye—in the heart; tatyaja—left aside; vraja-sundarih—the other gopis.
"Lord Krsna, the enemy of Kamsa, left aside the other gopis during the rasa dance and took Srimati Radharani to His heart, for She is the helper of the Lord in realizing the essence of His desires."
Link to this page: https://prabhupadabooks.com/cc/adi/4/219