وَقَدْ يُحْذَفُ فِعْلُهُ؛ لِقِيَامِ قَرِينَةٍ جَوَازًا، نَحْوُ: «زَيْدًا» فِي جَوَابِ مَنْ قَالَ: «مَنْ أَضْرِبُ؟».
Translation: Its verb may optionally be omitted when context provides a clue; for example, “Zaydan” in response to “Whom should I strike?”.
Qarīna is an available contextual clue. The question supplies the omitted verb in the answer.