• gṛhītvā — having seized
  Absolutive of √grah. The same verb used when He grasps Yaśodā's churning-rope, the gopīs' garments, Arjuna's reins. The hand is the same hand.
• śṛṅgayoḥ — by the (two) horns
  Dual locative — both horns at once. Kṛṣṇa's body is described again and again with this kind of precise spatial control; nothing is loose or accidental.
• aṣṭādaśa — eighteen
  Aṣṭa (eight) + daśa (ten) = eighteen. Commentators delight in such numbers — the same eighteen as the Gītā's chapters, the Mahābhārata's parvas, the days of Kurukṣetra. Numerical winks across the corpus.
• gajaḥ — an elephant
  Comparing Kṛṣṇa to an elephant fighting a rival elephant — a register that names Kṛṣṇa's playful adoption of the demon's animal-scale rather than His Vaikuṇṭha-form.

• Where do you wish Kṛṣṇa would just remove a problem rather than letting you wrestle it with Him?
• What would 'seizing by the horns' look like in your current struggle?

Two elephants in rut clash, and the larger one steps the smaller back. The Bhāgavatam selects the elephant-image rather than a god-image: Kṛṣṇa fights at the demon's scale, in the demon's idiom, and still wins by eighteen paces.